But the 1p/2p isn’t a bug or ‘glitch’ though. It is still a tiny amount of the data charged.
Data usage isn’t ‘finite’. Until networks design a system to live record/track data usage and charges which is almost impossible as smartphones continue sniffing or use data, this is always bound to happen.
As has been mentioned, only way to not fall victim to this is queueing or recurring a goodybag or turning mobile data off in phone settings probably some megabytes before a goodybag is about to expire even though this isn’t practical really.
Is it a bug though in most cases when you get to root of problem members have let there goodybag expire and not used WiFi to buy another they use the web,
important bit is it uses data to get to free giffgaff page and that is where the odd 1p or more disappears to .
Since you can buy goodybag by dialing 43430 the 1p problem has declined ,
i no longer just tell them to contact agent first I explain it to them and that is last time they get the problem
I think members have created the 1p so called glitch and by letting a goodybag expire and topping up first then by buying goodybag on web low and behold I lost 2p ,
I rejoined giffgaff in November 2017.
I activated my SIM without inserting SIM into a phone.
Topped up £10, instantly dropped to £9.99.
So there is no way data could be used.
If it's the case that a user had been careless allowing a goody bag to expire then surely giffgaff can tell the difference between that case and this clear glitch as I proved above.
When it dropped to £9.99 I contacted an agent and they recredited me the next day. I quote the agent: "I apologise for any confusion over this, sometimes when topping up the 1p deduction can happen as a system glitch"
They know. It needs sorting.