Very unhappy Telkom customer

I am so unhappy with Telkom. Have a tablet contract with them. I pay my bill manually every month. Now they are charging me extra debit fees of over R220 per month! And they also blocked my sim card/service that I pay for every month! This is ridiculous and unacceptable! Emailed and phoned Telkom numerous times and they can't assist me over the phone. I will never ever get a contract from Telkom again!