Mr1100 Ee connection

Bonjourno all

I'm 90 years old and terrible with computers. I recently bought a netgear mr1100 with an Ee sim in uk

Issue: error saying mobile broadband disconnected your data connection is disconnected

Have called through to ee who advise the problem is with netgear. Have tried amending the APN settings to what I believe to be ee settings however doesn't seem to change the error message coming up

Any help would be appreciated