I’m a long-time customer writing to urgently request the reinstatement of my deactivated number

I’m a long-time customer writing to urgently request the reinstatement of my deactivated number. I’ve been abroad for work and discovered after 3 months that my number was deleted due to inactivity. I wasn’t aware of this policy and have since tried repeatedly to recover it, with no success. This number is vital—linked to all my banking apps, email, work, and school accounts. It has not been reassigned, yet I’m still being denied access despite offering to provide full verification and to pay any penalties. Why do we RICA if it doesn’t protect us in cases like this? I need my number back and kindly request your assistance.