If you use a Garmin inReach (formerly DeLorme) for spotting I suggest you check your invoices carefully. Twice now I have been billed for text messages at the “overage” rate (59p each) even though they fell well within the bundled allowance. They refunded without quibble when I queried the invoice.
They say that this is a known issue which only affects a small number of people and that they hope to have it fixed soon.
Yet again Garmin have billed me for inReach text messages which fall within the bundled allowance for my plan (Freedom Recreation). They’re always very nice about it and credit my account when I point out the error, but it is very annoying to have to query nearly every invoice.
When I was BT customer, my phone/internet bill was wrong every quarter for 6 quarters in a row. Ring up, wait ages for customer service rep, moan and point out errors, get bill amended and some credit because they had made an error. I’m not sure how they could completely snafu themselves every time. Billing is not rocket science. Count up what customer uses, charge them for it. See, simples.