Unfair practice

I contacted Vodacom customer service twice regarding the increase of my Fibre account and was told it will be escalated. To date nobody has reverted to me with feedback as to why my two year contract is increasing with+-200 before the due date in August 2024. In the beginning the fibre did not work for 2 months now they increase the monthly premium prior to end date of my contract. They actual in bridge of contract, can I get a clear answer.