Hello @Rosieposy8,
Your allowances are used first before the add-ons.
Once all your allowances have been used, your add-ons will kick in. You’ll still get the text advising 80% and 100% of your allowances being used as this is normal.
However, the charges should not be applied if an add-on is active.
Have you checked the app/account to see what the charges are?
Add-ons/inclusive allowances won’t apply to non-inclusive numbers.
For example, calls to 118 and 09 numbers are not included.
You can also set-up a cap to prevent any out of plan usage being incurred.
A list of the charges can be found here: https://community.idmobile.co.uk/your-id-mobile-bill-61/why-is-my-bill-higher-than-expected-32111
You can find out about bill capping here: https://community.idmobile.co.uk/bill-capping-62/what-is-bill-capping-31841
If you want to set-up a bill cap, check out this link: https://community.idmobile.co.uk/bill-capping-62/how-to-cap-your-plan-31843
Mohammed