I mean they take 5 business days to reply. If they don't reply, it's okay to send one webform request per week to let them know that you can't travel and not like whatsapp messages when your girlfriend does not reply after reading your messages
IRCC is aware of us thats why they came up with COVID19 delivery measures which includes not cancelling CoPR after its expiry even if we are unable to travel due to ban or COVID19 situation in your country. As per current situation they don't even know when the travel ban will be removed as situation with COVID19 could go south. We should also keep in mind that ban could be lifted prior to 30 June to maybe extended further if its end of the world kinda situation. Ban could be lifted in steps first CoPRs>Students>Work permit>Completely. So be proactive but also smart with the situation that we have here in hand. It's not just Canada ban is everywhere in the world right now.
We are the chosen ones not the forgotten ones. Staying safe is the first priority.