MTN **** and stole from me

My contract with MTN ended end of June 2022. I have a 50gig R299 package with strict instruction for not out of bundle or additional purchases allowed. According to me the law in SA states that should a contract expire you can continue without signing a new contract as long as the terms of the contract stays the same. MTN continued with an out of contract bundle of R1126.92 for 20 Gigs without a call or approval. When I got the debit order reminder I noticed this amount and phoned customer care to cancel the contract. The lady that answered offered my a 150gig contract at R349 for 24 months and promised to recall the out of contract bundle. This did not happen and the debit order went through. I threatened to reverse the debit order and they threatened to black list me. Not only did they ********ly deduct money out of my account they **** to me in order to get a new contract. The most ********* company I have dealt with in my life!