Unprofessional treatment towards loyal customers

Utterly disappointed and disgusted in Rain customer care services and the network provider it self, we have been a supporting customer over the last 4 years, we recently upgraded to the new rain one and took the 100mb + package deal. Suddenly I get a notification that I need to pay R1245 for the month but the agreed upon amount for the monthly subscription is R995. After being without wifi for nearly 2 week till current, trying to get ahold to customer support services the one day I got hold of them my call was awnsered and the lady asked me to hold as she was checking something on the system, a whole 15 mins, I asked for feedback, she just kept quiet did not respond to me. I dropped the call? Now I got my recent invoice on the 30th of May and it still included the old package which rain never canceled apparently as per my call with then today, and stating that I have to pay R3000 for June? The calculations don't add up.. this is very poor and unprofessional, I am sure I'm not the only one to whom this has happened. Get your act together RAIN!