SIM SWAP FOR MY CONTACT PHONE

I went to mtn byanston to do my sim swap on the 15/06/2015 because my cellphone was ****** and also to blacklist my cellphone which was ****** . Up to now my contact line is not working , i cant even do payment on my online banking . I went there several times but keep on saying MTN is on strike so there is nothing they can do . And also insured with Cell sure (fFair trade ) , l place a claim with them and i have do a follow up myself . Today i phoned them to enquire about the email with sent to them on Tuesday as they could not provide me wit feedback . I asked the person which i spoke to , what was their turn round time , she said it 24 hours but that is not true because what even email with i have been sending to them i have to make a call to do follow up . I don't even have a claim number as i was not provided with one . So insurance companies have got a bad service . YOU SEND AM EMAIL AND YOU COPY 4 PEOPLE BUT cannot get a response.