All Charges Paid on Closed Account, Still Contacted by General Credit Services

Hello there, 

I previously had an internet account with Telus and received an initial email from General Credit Services advising that I had an overdue balance on my account, after it was closed. 

Upon receiving the initial email, I logged into my profile and paid off the outstanding balance on the closed account.  

Since paying off all the outstanding charges, I have continued to receive two additional emails from General Credit Services advising that I have an overdue balance, and the latest email advised I only have 7 days from now until they will report the matter to credit bureaus. 

Can someone from the Telus team help to inform General Credit Services that my now-closed account is in good standing and that they can stop emailing me?