Money stolen from account with illegal debit order

My contract with weavacell ended December 2014. I have to date had TWO illegal debit orders go from my account. The latest was 1 July 2015, the amount of R411 was stolen from my account. I immediately emailed them and demanded my money be paid back. I received an email back stating they have requested an urgent refund, this morning an amount of R294.46 was paid back to me. Weavacell kept R116.54 of my money. I have tried calling them this morning, no answer. I have sent an email, and received no acknowledgement or answer as to why I didn't receive all my money back. If one more illegal debit order goes from my account, I will take legal action. Please rectify IMMEDIATELY and pay my money back TODAY.