Lerato didn't put a limit as requested

Dear Hello Peter as on 25/09/2015 I took out a MTN minute-50 package tariff 50mins@R249 Data100 + SMS100 x 24 months on the 25th Lerato explained that this is NOT a open contract because I clearly said I don't want an open Contract. on the 27/11/2015 I recieved a message from my account that MTN took R1561.26 and I loged a error at sasolburg branch the response was 14 working days before my money was refunded and still got refunded on 27/11/2015 a recieved my monthly billing per sms and they took the amount of R2661.17. I emediatly took off work and went to the branch to see Lerato and her response was se will log an error @ headoffice and will come back to me at 12h00 as for she didn't come back to me I went to her again and she gave me heaoffice number so I phoned and spoke to Issebel she told me I need to go back to the Sasolburg branch and need to speek to the manager for he need to send head office an email to refund the money for Lerato didn't log a limit if MTN doesn't want to refund the money Lerato wil be kept liable. When I did see the branch manager he said he could help me .I spoke to Isebel again and she wil notify her manager I didn't get any response or answers??????