I live in Brighton - if I threw a stone from my porch, it might land on the Pier. I have an S8, and when I am here/home/in this central location, I get 1 bar worth of reception. It is ridiculous for a Network to be useless in such a location. Who can I alert about this so that it can get sorted?
You can check your network coverage here: https://giffgaff.com/coverage-and-service#coverage
If there are no service issues, it will be a general issue with O2, you can contact them here: https://www.o2.co.uk/how-to-complain
Hello the masts belong to o2 if you live in an earia that has bad coverage there is nothing you can do ,
try a couple of things if not I am sorry but you can only try a different network,
first put postcode here check for mast problems https://giffgaff.com/coverage-and-service#coverage
if if all ok try a manual roam to force network http://community.giffgaff.com/t5/Using-giffgaff/Force-the-change-of-SMS-settings/ta-p/4871794
also check APN if wrong insert