Hi I have had the same issue with my BP Pulse white oval charger. It was installed around 18 months ago. A full year before our EV arrived. I borrowed an ID3 and tested the charger and all seemed well. Some time later I noticed a red light flashing, I contacted BP support, I was told the charger had lost contact with BP and to turn it of and back on again. This worked. But several days later the red light was back. This time I was informed an over the air firmware fix would be done. Yes the red light came back. The fix has always been turn it of and back on. The red light could come back on in an hour or 5 days.
After a year I finally got my EV, now the 2G problem really sucked. The smart charger has no smarts if it cannot communicate with BP.
I asked BP to honour the 3 year warranty. Repair or replace I was informed as you were words to the effect, “it’s not our fault, we do not have any control over the 2G phone system.
In a last effort I contacted Motability and explained all the above.
I was asked a load of questions re the charger and how or what BP had or not done.
Motability I believe made enquiries and got back to me.
The upshot was Motability arranged for an installation of a new charger, in my case a Ohmi Pro charger. I would recommend you contact Motability and explain things.
The Ohmi Pro works with Octopus Intelligent.
Hope things go well.