VoLTE incompatible phone still making calls and texts

I called #8378, it told me that the call test failed and that my phone would be affected by the incoming 3g network withdrawal on July 31. It's 3 days later and I can still make & receive calls and texts. My SIM card is VoLTE compatible. I live in Québec, my phone is a Samsung Galaxy S20+ 5g. I'd love to be able to keep this phone. Can anyone make sense of this?