Bulb swapping day & night readings around, now ignoring readings & photos given & estimating!

BULB GETS WORSE
Ignoring my previous complaint about swapping day & night readings, Bulb have now produced an estimated statement despite my having provided readings & photo of meter.
Bulb now say I owe them £71.97. In fact I’m £283.49 in credit, not including January’s direct debit of £101.44.