Contract

I took vodacom contract for home router November last year that states 250 Gig will be R249 for 36 months. Last month on the 30 June 2023 midnight Vodacom deducted an amount of R267.01 When I check on my app information was changed and there is a message that shows after 5 months, I will be receiving new increase amount and I noticed on my phone messages one opt pin was requested to sign into gmail account. I visited the store to enquire about the cause of my contract to increase , someone who was helping me there put me through on the phone call to speak with a call center agent to explain to me, The call center angent mentioned that there's a clause on the contract that state vodacom has a right to ammend the contract and I'm not the only one who have an increase in my contract. She asked, didn't, I get notification or email and also how did I get my invoices and statements. I explained to her that night of the debit order , I noticed that many changes were made without being informed on my vodacom app and I don't use vodacom number , I only have home router. Vodacom simcard is no longer working because I have one cellphone. I screenshotted all changes, I have noticed on my app. When, I ask for cancelation the call center agent transfer my call to another department of cancelation the call center agent told me in order to cancel the contract, I will have to pay R9 240. I want see my lawyer so that I may take an action against Vodacom. Now I recalled that , after I paid all Activation fees and pro rata. I noticed that when I check my app 1 Gig used to disappear. I went to store to enquire but I never get satisfying answer. now it is too much for me , I have to see my lawyers.