Awful - DO NOT use

Several years ago, following a breach of security at a bank, the bank gave me a years paid up membership of this, so that I could monitor things. After the year was up, I let the membership lapse. Recently, I noticed on Quidco that they were offering a month trial, free of charge, and that my card would only be charged if I failed to cancel after teh trial. I then notice that I have been charged for free month. On checking with them, they say that as I was a member previously, I do not qualify for the free trial. It does not say anywhere that I do not qualify for free trial. TOTAL RIP OFF!! Why is the financial ombudsman or other organisation not lookiing into the behaviour of this company?