Disappointed beyond words

I have been contacting MTN for a copy of my contract for the past month. I have had no feedback and have been pushed from pillar to post. I've been calling the call centre and have just been given numbers to contact and some of which are non existent. I cannot stress the urgency of the contract as the phone is in for repairs and they need the contract in order to have it repaired. The contract was taken with nashua mobile which then closed down and contracts were transferred to MTN. Nobody offers any assistance.it is the worst service I've received from MTN ever since I began dealing with them. All I need is a copy of the contract stating the day which it was signed when I upgraded and the phones imei number on the document. How difficult is that. And I get offered a statement if account!!!!!! I am due for an upgrade but how would they upgrade me if they cannot furnish me with a copy of my contract. I am utterly disappointed with MTN. I have been a customer for many.