Dreadful!!! Predictor Early

I purchased one of these on Monday 4 days before period and then Tuesday 3 days before period. Both tests gave me a positive result! So just to be sure I took a FRER and took in the same sample that I used to get my positive result on Tuesday to my GP, they sent it to the lab and both the FRER and the GP's test came back negative! So of course I purchased another today and again a positive result! I called the number on the box, to be honest they didn't seem surprised so I feel they get a lot of calls like mine! They offered me a refund, but when I asked if they can give me my sanity back the woman chuckled! How rude! Now I'm left with the feeling that I've lost something, when in fact there was nothing to lose in the first place! I'm so annoyed with this company and I would say to anyone DO NOT BUY ONE OF THESE TESTS! It left me feeling so heartbroken. I've since read on many forums of women getting false positives with these tests. What surprised me is I did use this brand 20 years ago with my first child and that was a correct result! So I trusted these tests. I will never purchase one of these again! I have had better results with Internet Cheapies, one batch only costing me £1.60 for 30 worked better than these!!! At least they gave me accurate results! The result came up in around 2 minutes and the test was done correctly as I've been trying to conceive for a while now, I know to follow the instructions completely. Therefore there was no mistake on my part, in fact the only mistake I made was buying this brand in the first place!!
Got a cheek naming these products Predictor!!!