*********** company and no customer service

I have been battling with dstv for the past three weeks. I'm on a price plan and my account gets debited on the 20th without fail. Price plan of 959 ended on the 20th of August and entered on the new one for 844 but to my surprise I got a statement that said I owe 200 first week , 2nd week it went up to 300 and this week on Monday it was 1300 yesterday it was 1200 and this morning it's 1000 yet every time I call I get told they don't know why the system is charging me so much and they are going to escalate to the support department and they reconnect my account but the next day it gets disconnected again. I'm spending my money and time on the phone sorting this and my concern is that I'm going to be debited with the incorrect amount tomorrow. Dstv is *********** and doesn't have customer service. Even their team leaders don't care about clients coz I laid a complaint and no feedback till to date