I WANT TO CLOSE THE ACCOUNT!!!! PLEASE LET ME!!!!!

I have been trying to close my account for the last few weeks with no help from Mobicred via their Whatsapp line. I am overseas and do not have a South African number so I am stuck using this very ineffective method of communication, it takes a few hours to get a very inadequate reply. After making payments for months to one collector I am then told "oh no your account is with another one", yet I've been PAYING and COMMUNICATING with someone else. I ask how can I close my account and where do I get my statement... they say you can close it at R0.0 and if I want a statement I must contact that other collector WHO HAS NO IDEA WHAT PAYMENTS IVE BEEN MAKING BECAUSE I HAVE NOT BEEN PAYING THEM!!!!!