Dstv is really frustrating and useless

I recently contacted multichoice to reconnect my services after one year of not having dstv and to my surprise they telling me i owe them and have an outstanding balance which is incorrect because i had called and cancelled my services with Dstv at end of april 2019 and was told because it is already month end they will only disconnect me at end of may 2019 and since then i did not have dstv. Also what is totally surprising to me is that they used to debit me at month end and howcome all of a sudden a year later when i want to join again they tell me i owe them and must settle the outstanding balance before i can be reconnected. Also it is so difficult to sort out matters like this as no1 is helpful it is like they are all on a permanent holiday at multichoice. All i want is this to be resolved and my services to be reconnected as i am sure that my account got mixed up with someone elses as forever they do not know what is happening at dstv and keep saying someone will get back to me and already 4 days has past and no1 has gotten back to me stating the matter has been resolved and you will be reconnected but the pmt email address insists i have an outstanding balance. If the person that was suppose to disconnect my services did not do there job whose problem is that definitely not mine and also i feel like because they are loosing customers they trying to gain income from customers who want to reconnect services by stating they have an outstanding balance. This is really frustrating and time wasting if they messed up the account they should come forward and tell me but don't make me pay for something i know i do not owe on. Someone at multichoice MUST RESOLVE THIS MATTER IMMEDIATELY AS ALL I WANT IS MY SERVICES TO BE RECONNECTED. Stop insisting i owe dstv when it is not true and i have proof that my services had been cancelled since May of 2019. When you a new customer with them they very helpful but now when they know you are an existing customer they just push you aside and make you wait while they deal with new customers first.