Very bad company and money ********

Very bad company and money ********. i have been trying to cancel my Virgin active account for the past year now they taking me to debt (MBD) people calling me every two minutes saying i own them more than R4500 if i don't pay they going to blacklist me i will not be able to buy anything in future. i work in construction industry where i travel around the country some place where i will be working its in the rural area where these no Gym (Virgin Active) i had to cancel my account.