Multichoice

I have been having a problem with multi choice since the 03rd of February 2020. I paid 450 on the 3rd at around 6am and around 7:30 i was disconnected. I phone in and i was told to send proof of payment which i did. They reconnected me. But now the problem persisted for at least twice a week which i have to buy air time phone in then would be put on hold for 20min and if the airtime runs out no one will bother calling me back. I have then go buy another air time phone the get connected. I am soooooo frustrated. Everytime i phone i am told its not their fault its the system that disconnects me. Today my last straw is that i was disconnected as ussual and i am told i owe R920 because everytime i call there's a fee that is been charged. I phoned again to put me through to the department where i can lodge my complain i am told thatbilling department and they are the one who can only get hold of them. I asked for their details i was told they will write them email which they are not sure if it will be resolved soon as i am not the only one with complain. Pleases help me my number ***