Company refuses to sign a T2200 form

Hi, I am a newbie (long haul, cross-border). My company calls my cell phone all the time and I often use the ArriveCan app, yet, they refuse to provide a signed T2200 form so I can claim my expense when filing my tax return. I know it is reasonable to claim such expense as I use my phone solely to earn money. Can anyone please advise? Thanks.

 

But I read this:
Employed Individuals
"Generally, an employee may be able to deduct certain expenses paid for employment if they had to pay for the expenses under their contract of employment and they obtain a completed and signed Form T2200, Declaration of Conditions of Employment, from their employer. In particular, an employee may be able to deduct a part of a basic cell phone service plan "
CRA Info on Tax Treatment of Cell Phones - Ontario Trucking Association

I am not asking for allowance/reimbursement so I wonder why my company will refuse

 

Thanks for your advice.
To begin with, I bought a dual sim phone for solely work use, i.e. separate 100% from my personal use. One slot is for Canadian communication with my company and the other sim slot is used to communicate in the U.S. My company calls me through out the day and the colleagues in the U.S. also calls me on the phone but not using the messaging system in the truck. The expense is not small. If I use the trucker plan (Rogers/Bell/Fido) it is $120/month...

 

Thanks for the insight and sharing your wisdom.

 

Appreciate your advice!