Not the greatest start to 2021

- Worked at a global company for over a decade in a customer facing role.
- Fell sick and was on illness benefit for a while.
- Doctors and social welfare now state I am fit to return but will require some accommodation, need to be non-customer facing for a while.
- Employer stating that they can't have me back as they can't accommodate and are terminating my permanent contract paying notice.
I must add, this is a global company with offices accross Ireland with over 2/3000 employees.
Surely they "can't accommodate" isn't true. The role normally wasn't heavy customer facing, just known as a "customer facing role". They have advertised a lot of roles which could fit my present condition.
Not sure what I should do as I'm not getting paid illness benefit and can't return to work.
Thanks for reading.