Bad Services and no communication

Bad Services and no communication

I Had a fibre line installed for my parents and Two unforeseen events took place in this year. First is I had my own business and it had to close its doors as my partner witch is my mother passed away. I then in gave notice to close the line 30 days as the contract states. And in all this we moved my dad in with us that's the reason for the cancelation. Now all this happened from the 21 of February 2022 till end of march 2022 when I gave notice I got an email saying no charge I then was fine we moved and now 2 weeks ago I got a mail saying I owe them on witch I rep**** and asked why just got a ticket number no response today the 1st of September 2022 I get a email from there legal team. I never received any communication from them up to now so tell me how does one go about this .