Vodacom complaint

My 2 year contract expired end of Jan this year. Vodacom changes the end date somehow on their system to end of June 2022. I have been battling for a month to get them to correct the date on their system as I am cancelling and porting my number to MTN. Still not done and each time a new consultant tells me they will escalate the matter. Shocking Vodacom!!! I have been with you for so many years and your ethics are terrible