alihazer89 my girlfriend is using the same Network as me and she is experiencing no issues at all
Your Sim-card may be failing.I would try a Sim-Swap,
You can order sim-Triple Pack free or quicker to buy one and do a,"Sim-Swap"
The ignore the deal adverts on the packs as it the Sim Card is Blank until you use it.
I'm too impatient to wait for a free Sim so..
buy one for less than a pound at B&M/Poundshop/Tesco/Argos/Iceland/Heron Foods and even my Corner shop sells them now and do a,"Sim Swap".Do NOT activate the New Sim e.g put any money on it as a Blank unused Sim is needed for a Sim swap and the Sim-Swap process will activate the new Sim.
A lot of these shops are open Sundays until 4pm and 8pm weekdays(Heron Foods open until 5pm Sundays)
and here's an easy to follow video,
you can only do a SIM swap between 4.30am and 9.30pm and it can be like when you first join giffgaff e.g shut the phone down for a few mins and or keep restarting the phone over a few hours after the Sim Swap.
This will transfer your number and allowances across.
Please click the Thumbs up and or,"Best Answer" if any forum posts have helped 🙂