New phone user Service causing stress

[Anonymous]

Credit ran out, tried to top up, call the 4444 service for some reason the transaction doesn't work. Try again online and this time it works. Next week I need to top up again so I try phoning and yet again it doesn't work. Go back online and now this no longer works either. I wonder did my debit card get reset so I check with my bank and no, nothing wrong on that end, even used the same card to purchase other things and it worked fine. I tried to use the customer service on this website but it doesn't work. O2 keeps texting me about a big bundle thing but I can't take advantage of it because topping up doesn't work. I just used the Lend Me A Quid thing and now they are going to charge me if I don't top up soon. Overall I guess I need advice on how to fix this and what service to use in the future to make sure I don't hit 0 credit. Being at 0 credit, being unable to contact anyone is a huge stressor for me so I would like to avoid it at all costs.

[MI5 · Accepted solution]

Auto top up if you want to stay on PAYG but a sim only deal might work better for you.
You'll never run out of credit then
https://www.o2.co.uk/shop/sim-cards/sim-only-deals/?cm_mmc=googleuk-_-PPC_Direct_Simplicity-_-Simpli...