Breach of contract / direct debit guarantee

I installed Home Connect via received an email saying they are increasing the rates from R448. 01 to R568 wefv1 March 2022 due to increased supplier costs from their supplier (Zoom Connect) which now becomes the customer's problem. As far as I am aware I had signed a 24 month contract to pay R448 per month. Not even 1 month later and R120 increase which is more than 25% increase.. Absolutely ridiculous