Welcome to the community and thanks for posting. I'm sorry to hear your wife has no mobile internet access.
I'd really like to help get to the bottom of this. Could you please answer the following:-
Does she still have the problem?
Is she able to make/receive calls and texts?
What area is she in? (Including first half of postcode)
Please let me know and I'll check if there are any area faults.
How did you get on with this? Is the mobile data now working again?
Please let us know if you have any further problems.