Hacked lines

In November 2020 i received a call from someone asking if i app**** for a sim swap, and i rep**** no and i dropped the call, right after the call i phoned mtn telling them what happened, while on the call with mtn R200 airtime was taken from my account the did refund me the R200 and about 10 min later that R200 was taken again with my loyalty points, i phoned mtn again and they said that my account might been hacked and they checked that all 3 my lines limits was set at R1.00 and confirmed that is was. End off December 2020 i did receive a bill for R3700.00 where my bill is normally R1300.00 to R1600.00. i phoned mtn again and they went through my account and picked up that the limits was lifted and that they can not see who did it, but they will investigate, i received a sms notified me that that my query was closed, and i phoned mtn again and they told me that my account stands on R7000 + and that my query was never sent to the ***** department and that has been submitted to the ***** department 12 January 2021 and that it will take 5 to 7 days to resolve the matter on 13 January 2021 i received a sms that states the query has been closed on the 14 January 2021 i spoke to mtn AGAIN and the service champion told me the query was sent to billing again and not the ***** department, she also told me that the query from October 2020 is still waiting to be allocated to the right department, now i must wait for another 72 hours before contacting them again to find out if the problem was resolved...Ref NR *** given 14-01-2021, how long will this issue take to be resolved????