This is a CRA issue, please contact CRA 1800-959-8281.
Due to the current COVID-19 epidemic, the call volume is more than usual. And their return process time os longer.
You can check the estimated time to process your return using the CRA link:
https://www.canada.ca/en/revenue-agency/corporate/contact-information/check-cra-processing-times.htm...
I hope this was helpful
