Contract mess

I am so frustrated with Virgin Active South Africa Head Office.I don't even know where to start, I've had a membership with them for over 10 years membership number ********** 816, last week on the 11 June I decided that it's time to make use of some benefits by linking my account with Multiply. That's when my horror began, the next day after signing up with multiply with their sales consultant Ayanda Mabena in Sunnypark branch, my new card was not working. I thought it was because it was not properly linked. I then send an email to both Ayanda and Eka the Club Manager to notify them that my card was not "activated". None of them rep****, today I then phoned them and finally spoke to the Manager and he said there was a problem with their system. Later on Ayanda Mabena called me with some confusing story, according to her she said on the system it shows that I was in areas for between 2006 & 2008, but it was not me who took up that contract but the person took it on my name and was not faithful with payments. Now my concerns is why was I not made aware of these when I joint Sunnypark branch in 2013? Why is it now on me that somebody decided to sign a contract, it is no t my signature on that contract. Why am.I being held responsible for something that I did not agree on. If you check the contract that I signed I have never missed a payment, isn't that telling you something?

Please come up with a suitable solutions. Mabatho