Terrible service from DSTV

Ther service received from dstv is absolutely terrible, you have to call every week to get the service paid for, they always have all these adds to upgrade and then when you do its the worst time of your life!!! how do dstv retain their customers if this is the setvice they provide? each person j talk to they say there is an amount due, but dstv debit order our account, then when you call the call centre they guys say no there is nothing outstanding and they are sorry then the service works for one day, then you have to call again just to get disappointed once again by the service they provide!! i wosh i could cancel our service by dstv and would recommend that to all, how does one go to get this issue sorted and enjoy the benefits paid for? why must it always go to this extend to get the service you deserve??