Bad service with mistakes on account

This is not the first time i having n bad experience with dstv. 3 months ago i struggled for my account to be separated from my brothers account. After i lodge complaint a staff member from dstv phoned me. Said all sorted. I went ti work in england for 3 months. When i got back there is extra charges on my acc. I phoned in spoke to a person for 15 min and then the phone got cut off. I am waisting money on phone call every time for dstv's mistakes. Person says i was in arrears but i am on a 24 months fix ammount and every month the correct ammount was taken off. The lady that assest d me looked at the last 3 months and couldn't figure out what that ammount was for. And then after 15 min of my airtime the phone got cut off. Noboddy phoned me back. Pleas can someone from dstv phone me asap. And sort out your mistakes. Dstv is suppose to make my life enjoyable. But and the momemt costing me extra money, time