Account Query ***

I have been a client on contract for more than ten years now but I must say that I am totally shocked and very highly upset with MTN. 2 Lines were upgraded 13/02/2021 and packages is R399.00 and R420. MY one line that is suppose to be R399.00 *** is now on R5319.98 and March shows R3855.98 I have requested call center agents to logg a call for Query on account which was done 19/03/2021 still up to date no feedback after numerous call. We then went in to Carnivall mall Brakpan store which only advise to get a Statement and there is 100MB loaded for R500.00 but *** seriously who will load it as its definitely not me as I do know this is way more expensive than normally we also requested to cancel this as this line is not purchasing this as someone might be hacking this line im not sure. But I can definitely not spend almost 6000 on mtn a month is this how MTN treats there loyal clients. The reference number for Query that was logged is *** and still not resolved since 19 March 2021. I need urgent feedback as this is unacceptable