******* upgrade

In the 13th of October 2015 my Contract was ending and i wanted to migrate to prepaid.On the 12th i went to the shop to do the migration when i was told it only expired the following day and i should come back. I left the shop and about two weeks later got an sms stating that my contract was upgraded.i did not ask for the upgrade and was told that they could not do anything about it. I have phoned them and mailed numerous times with out any response.I then cancelled my payments for my other contracts and was told to get an affidavit so they can take it further.i told them i will not get one until they send me the documents were is signed for the upgrade.I have phoned for about three times weekly but until now have not received any feedback from them.