CONTINUED UNEXPLAINED BLOCKING OF MY CARD!!!!!!!

Last month I went to make a purchase on my Game card and lo and behold, when i got to the till point, my card was blocked, I stood there for more than an hour, with the lady assisting me having to send my id with the three signatures 7 times before they finally received it and I was severely late for returning to work, but eventually, they unblocked my card and i made my purchase. Fine, that is ok. Then I go back today to make a purchase and AGAIN i cannot make a purchase because my card is blocked. No-one can tell me why and there I have to stand AGAIN for an hour and then it started with the sending my id multiple times. I spoke to the ***** departement and they could not tell me why my card was blocked. I asked why you dont contact your customers to advise them t here is a problem with their cards and i was told you did contact me , which you DID NOT. I only received my statement via email. I eventually left after nearly an hour and a half and AGAIN i got in trouble at work for being so late back from lunch break. So you are happy to take my money every month to pay for my card but keep blocking my card with no explanation and wasting my time everytime i come in by making me stand there for more than an hour at a time? I am very very upset and I will reporting this to the RCS Cards Head Office as well.