Unfair consumer practice

I rightfully cancelled my Mweb cantract with one months notice in November 2020.

Now they want to hold me accountable for 3 months premiums, and threaten to hand me over for this how can I possibly owe them any outstanding amount when I canceld my contract with notice. (Out of contract period) plus being an internet service provider they can see ZERO data used for that period!! We moved house and I informed them of this. Now they claim that the email was never received after I forward ed the proof!!!

This is unfair consumer practice which I am going to take up with the consumer protection act.

Id like to upload a screenshot of my comunication to them.