Welcome to this customer to customer forum. @Missmegans
Did you use this coverage checker page https://www.productsandservices.bt.com/mobile/4g-coverage-checker/
Look for 2G coverage, that is for phone calls.
Do you have a landline phone as well?
There could be an issue with the local mobile phone site.
Have you checked the service status page, use your mobile number and select mobile issues?
If you cannot find anything, The best thing do do is to contact the Mobile Chat Team and see if they are aware of any local issues.
You do have a 14 day cooling off period, if you change your mind.
I'm sorry to hear about the problems you have with your signal strength.
I can't promise anything but I'd like to take a look into it for you to see if there's anything that we can do. To reach us, click on my user name and then on contact the mods. Make sure you change the view to Full view if you have it on Mobile view or you won't see the link. Once you complete that it'll send us a trouble ticket. We'll then get back to you within 2-3 working days.