Unhappy with the level of service

I had an account with Fidelity security for 3 years now.I called them on the 25.07.2023 to cancel my account. I was required to send a cancelation notice which I did .Later after 2 weeks I called to follow up with the cancelation because I didn't want them to debit my account. I spoke to a guys whom told me to send email to *** I send the letter twice.Two days later I called back again I was send from Pillar to post ,I then spoke to a lady she promised to escalate the matter she then requested a letter again I then send to ***

Again I called to do follow up I then spoke to Purity she again requested a letter for the fourth time now i did send to ***

Today I called they have since put me on hold for 1 hour waiting for Mmakwena the team leader to take my call.

I have been patient with Adt but they are taking my patience for granted

Their service is **** service ,why should one struggle for a cancelation?

I did mention on the letter that I gave them plenty of time to do the cancelation, should they deduct from my bank account I will be very disappointed