Poor service

I took out a cellphone contract in December 2022 , i did it online over the telephone whereby i agreat to a contract for over 24 months with the installment of R199. When i receive the contract the term was 36months which i did not agree to and the installment that was deducted was R208.59 . I have tried to contact MNT several times without any help . I phone the callcentre again on Theusday 7/2/23 KIM BASSON the manager was suppossed to go listen to the voice recording when the deal was made and phone me back but up and till today nothing. MTN services is very poor and so is management. When i phone again the callcentre ,the lady just told me go to the store and cancell THats it !!!