Bad service

I'm an existing customer ,that saw at the end of January 2022 that the line ( 200/100 ) FTTH I'm using is offered at the reduced rate of R 1159 . After phoning them they said that I must apply online for an "Upgrade " and that they will pick up that I already have a line and then just adjust the premium. Today after 12 calls to them I receive my new statement that indicate that I now have 2 lines at home. Making calls number 13,14 and 15 i now must write and email requesting the cancellation of one and request they adjust it back to the 1 st of February. From experience i can deduce that this will also not happen.