MTN IS STUPID

I lost my phone about 3 weeks ago, I informed my insurer and they requested me to block the phone with my Service Provider, I called MTN gave them the IMEI number, they tell me they cant find my phone on their system, I should go to any MTN Store, I go there and they call the same people I did and then tell me I should go to the store I initiated the contract at, I go there and the lady calls the same number I called and eventually they tell her she must send and Email to Dicqueries , she does and three days later DICqueries writes back to say my number is on prepaid , I just paid Just over a R1000 as a debit order , we write back to that CANT to tell them no the number is not on prepaid, we even write the cell number in the email body, they still write back and say its on prepaid, but MTN Customer services says its on contract, I really hate this company and I just took the contract in June 2015