There seems to be a lot of codes for Proscan. Here is a list that may contains some codes you haven't tried:
Proscan TV's Universal Remote Codes & Program Instructions - Universal Remote Codes
Tried all the above codes but none of them are working. I can’t connect the telus remote . I’ve tried using the browser to complete Marks & Spencer Survey 2021
Possibly try contacting Proscan or checking the documentation for the TV.