Inconsistent Monthly Subscriptions

I have been on hold with one of your consultants for more than 40 minutes. I want to know why my DSTV premium is inconsistent, first, you do not bill me on the agreed date which is the last day of the month. Secondly, you change my monthly subscription as you wish. Please, will you get someone to contact me or downgrade my package to COmpact as I am currently on a compact plus?