Sham merchants, don't payout on promotions & change terms

Wow wow wow, so I'm not the only one to be tricked with the £175 cash trade in your old mobile for a Google pixel 7 deal. SHAME on you carphone warehouse, as I have 2 contracts running now as the £175 was suppose to pay off the other contract.
My story, seen the deal above, looked at the terms and conditions which stated at the time and I have also taken screen shots of them, "trade in for £175 with a working or non-working mobile". I contacted CPW and went through the terms and conditions and would my phone be ok to trade in and they said yes. So, went ahead with the deal. When processing the only option I had when trading in my phone under "trade in" was "recycle", now I wasn't really bothered about getting any money for the mobile, it was mainly the £175. Everything went smoothly and the computer did not stop me to say my phone was ineligible, as remember from the T&C's it was any working or non-working phone. Anyway 6 weeks later after several calls to CPW I spoke to them today only to be told that I am not going to get my £175 as the phone was worth £0 and was ineligible. I was almost crying, I felt misled and taken for a fool. I have since been to Thier website and looked at there T&C's as they still have the deal running and can see it's been amended. It's lucky I took a photo of the originals and I have the phone logs, times and dates when I called to enquire. I have put in a complaint after customer services couldn't help to the tradeuphelpATcurrys.co.uk, I am not expecting a lot but I am going to fight tooth and nail for my money even if it means going to a small claims court, I did everything I could and by the book with Thier T&Cs, surely all the bad press just shows how bad things are CPW, make a men's and sort things out and when people make contact respect them and the deals you have made. Don't take customers for fools.

Just got a call back from complaints team, a person called Iviwe (they don't give surnames) who informed me that they are going to not pay me the promotional value, even though they acknowledge the terms and conditions of working or non-working phone. AVOID AT ALL COSTS, they will sham you. I am going to a small claims court for this.