Poor customer service, poor workmanship

I booked in my car for a new clutch to the Croydon branch on 30/9, I was quoted £263 and all seemed well. I was advised to go to them for as was cheaper than normal garages. As there isn't one local to my town, I used croydon as I'm there at weekends to be with my boyfriend. When booking the car in I was told there was an extra 25 which needed added on for the gearbox which I agreed to which for whatever reason not added on their website. Then when dropping off the car I went for a test drive so the engineer could test the clutch and gearbox. Before even getting out of my car I was then told another 100 for a cable which included part and labour. I find this hard to believe they would add on something without even lifting the bonnet or looking at the clutch itself. I was made to feel this was important and agreed. I was advised that it was possible to complete by the end of the day. 5/6 hours after dropping off I was then advised that I needed a new spring for my pedal as it was broken. Again I find hard to believe as my pedal was working fine. So whether this was broken when taking parts out I don't know. And was told the Kia dealer was not opened and will have to wait til Monday. Obviously as I'm not from croydon this effected me alot and put me in a very difficult position. I then decided to work around it in hope the car would be completed on the Monday. So i paid for the extra night in a hotel, and called in some favours for work so I had the Monday off. Monday came around and was then told the part would not be delivered until Tuesday. Not being funny but this is unacceptable, majority of garages nowadays has a same day delivery option for parts so I don't see how this couldn't of been delivered same day. Again I had to work my life around the poor service and lack of options i was given. So i paid my £18 Train fare and made my way home in order to work the following day. Tuesday came and got a call to say a wrong part had been ordered. And they had rung Kia and arranged a driver to deliver the part that day. This made me furious! Not only was the wrong part ordered. But somehow they managed to arrange a same day delivery! Why was this not an option on the Monday??? The part arrived in time and I was told my car would be done. So I asked as I was unable to call in anymore favours from my work please could I pay by card over the phone, and leave the car parked for me to collect later. And my boyfriend who lives in the area come and pick up the keys. I was then told it wasn't company policy to take card payments over the phone. Not being funny you quite happily bump up the amount I need to pay but then make it awkward for your customers to pay. I again had to go out of my way to make sure you received the money so I could get my car back. I then picked up my car, after another £18 train journey. Then on the drive home I noticed a very loud noise coming from my engine after every time I braked up to a junction. Why the hell my brakes caused a noise in my engine, when you worked on my clutch I'll never know?? I really wish I never went to their garage. I will NEVER use them again. And I will make sure I tell every person I know not to use you. Absolutely disgusted in the poor excuse of customer service. I was made to feel trapped with no option and no help from you what so ever. I'm 11 weeks pregnant and really didn't need the stress and making me go completely out of my way. Every time I spoke to the guy on the phone I felt he was trying to explain himself too much like he was making excuses. Never again will I let any of their garages touch my car.