Refused to cover an Oximeter because of process not being explained by them

I am unhappy about the fact that i was diagnosed with COVID and I have been struggling with my breathing and requested approval of an oximeter. I have asthma and this was declared on my application. i only found out that I had no access to an oximeter because i had not gone to a doctor to get a form filled so as to activate my chronic med benefit. obviously being COVID positive I couldn't go and see a doctor and i have had to do without. this is very disheartening. i am considering cancelling all my products with them.