Need asap asap beyond upset.

I paid my mtn account double and I have a call recording where I spoke to a manger Simpiwe stating that I owe R44 and some change for the bill on Jan that's why my phone was cut. And then I only owe a bill for February. So I paid the R44 and some change and the unlocked my phone. And then a few days later they blocked it again I tried to call them no answer the whole day. And I was very upset as I need my phone for work and couldn't go to a mtn store. Eventually I get to a mtn store to find out they blocked my account because I still owe a payment for Jan and Feb. Which is not true to my understanding. I have the call recording. The lady by the name of Glenda in the store sent my bank statements and the call recording to the person who handles my account which is a person by the name of Lesiba Moetjie. She has sent a email 3 times and Lesiba Moetjie just reads and does not reply. When Glenda trys to call she does not take the calls. I'm beyond furious!! They say now every month until my contract ends I need to go into the mtn store and unblocked my phone. Which I find very inconvenient. This has been going on since the middle of December. I need this sorted out as in now. I am leaving the country and can't go in and unblock the contract every month. I have other peoples phones on my contract aswell who pay me so I find it unfair for them to pay for a contract that does work. The other option is that I pay R2000 x 2.. Because my bill is R2000 a month.. And I was clear to say I don't have R4000 then end on this month being Jan. The call recording states.. And I will say it again that I only owe a bill in February of R2000. Call me immediately.