Extreme disappointment Webafrica.

I have a contract with Webafrica on a fibre line. On 30 September 2022 at 16h30 (note end of month and end of workday) they send an email notifying me of a 50% increase in my fee. I opened the mail on Saturday 1 October 2022 and was surprised they did not give me more notice. I immediately tried to cancel my contract (since it is an option) but got transferred to their very disappointing and inefficient chat line. (Having to wait for hours for somebody to respond) Nothing happened on Saturday. On Monday I tried again and after a very frustrating time (with the chat line) I got told I have to give a calendar month notice!!! And I can complain via an email address. Giving the circumstances there was no way I could give a calendar month's notice. Needless to say that they are not willing to cancel the contract after some email correspondence. They also now have blocked me from their email. I obviously think this is unreasonable and unfair. This is the latest ticket number ***