Taking forever to get a simple document

Im a contract MTN customer. I sent an email many weeks ago asking for assistance in getting hold of documents showing proof of purchase of two phones I got from MTN. After a long delay I was told to call MTN Direct and request there, I called and I was told that the system was down but that they would email them to me later. Weeks passed without response. I went into an MTN branch and they were not able to help me. I posted on the MTN Facebook page. The person that responded quite clearly didnt bother to read what I wrote before giving me a very generic response, in which I was told to phone 808. I did, and after an age on the phone, I followed the advice of the prerecorded message and sent an email to [Email Removed] on the 12th of March. I have not yet had a response. Months have gone by since starting this request. Meanwhile, my warranty is about to expire and I wont be able to get my phone repaired for which I need the proof of payment docs!<br> <br> P L E A S E H E L P M E !!!