Allowances when in Europe

I am in Portugal and have just finished a data roaming add-on which I bought. I still have data as part of my monthly plan and I'm assuming I can use that whilst here now that my roaming data has been used.
However, I received a text a few days ago warning me that my roaming data is about to run out and I will be charged £93/GB from now on. I have switched off data roaming as I can't afford to pay another £93. Can someone please confirm that my regular plan data can be used without me being charged? Thanks.

What plan do you have?

It's the 5GB USwitch exclusive monthly plan, and I signed up in December.

You should be able to use your 5gb when roaming eu.
Lebara has a 0 spend cap so you can't overspend unless you have auto top up on.