Call centre refusing to give me my paid up letter

I am still waiting for a phone call regardding this query I am so upset with the vodacom they handed me over to VVM Artonneys for a contract they claimed I never cancelled and I had cancelled it unfortunately I had no proof and I uncured costs of over R1300 I made an arrangement to pay this account and was offered a settlement discount on monday the 20th August to settle this account and pay R1030 I paid this amount but now this call centre is so unproffesional sending me from pillar to post and refusing to give me a settlement letter telling me that they need to still reverse some money to get account at R0 balance and this account is effecting my credit history.Can you kindly just give me that settlement letter it has been such trauma to deal with Vodacom as a whole I really regret taking that WIFI ROUTER with you as a cellphone provider you have made life hell I am blacklisted for nothing and now you inconviencing me with a paid up letter I spoke to the manager there at VVM who could not careless about my situation her name is Prudence Nthuping who reassured me if I am lucky I will get it on monday I need this letter today for an application needed to show that I am clear my reference for this account is RE:Vodacom (Pty) Ltd// LINDIWE MOKHOBO Ref:I ********** .I am also left escalate this to the credit obudsman as I have paid but now getting my letter is such stress,incompentence and a headache lesson learnt to stay away from dealing with Vodacom .