Unfair credit score penalization

Ive taken the liberty to email you my notice to cancel the account with Edgars on the 8th of Oct with the proof of payment of the account balance again on 8th of Oct.

I've received proof of account cancellation and paid up letter you sent me 13 Oct 2021

Yet this In November I'm greeted with 24 point deduction on my credit score?!

Im guessing because you guys only processee the cancellation the 9 of November, since I got the cancellation letter again.

I paid ontime I made a effort to send you the proof of payment went out of my way to avoid having my credit record affeci yet to no avail.

This is unfair and I want you to remedy this It's not fair that i get penalized to such an extent when I did my part.

Kindly get back to me