Hi Jayben60,
Thanks for coming back and updating the thread. I'm glad to hear that enlli was able to suggest something that worked.
Raising the spend cap will allow you to complete the donations however it is worth noting that it can put you at risk of other charges if you happen to go over your data allowance or make calls not included in your plan.
Keep an eye on your usage by logging in to your online mobile account here.
If you have any concerns or need any further help, you know where we are 🙂
Thanks,