Customer rep changed my plan and bills increased without my approval

Dear Team,

Only July 13th, 2026 I has discussion with customer representative about my billing issues. After resolving billing issues, they offered me plan change for 1000Mbps with $60 and I rejected multiple times. After sometime they said we will change without price increase and they sent multiple message for approval, During approval I see the price was not changed and did not approve. But later they changed the plan and increased the price and now they say I had approved and they can’t die anything. This is totally insane from Xfinity.