false adverti*****t

I joined the Virgin Active Sunward Park, and promised an Adidas R900 voucher. I instructed them to debit my account on the 25th of each month and this was agreed on. Went to a consultant to get my voucher and was told to give the call centre a call to get my voucher. I did this and they said that I will only get it once I visit the gym 24 times. I did this and called to get my voucher and they said that I will only get it on the 15th of Dec. But I do not qualify due to a debit order being returned. The debit was taken on the 28th of the month and not on the 25th as instructed. When speaking to the call centre agent I explained to them what happened and they said that they will make a note of it to fix it. At a later stage I called again and the person said that it has not been fixed and will only be sorted out after the 15th Dec. When I called on the after the date I was told that I won't get a voucher because of the debit order. I explained the situation to 8 different people and being called by different people all having to explain again and again. There is no effort put into correcting their mistakes.