My Mother is on a tiny fixed income and has no landline, so a mobile is a necessity. She had always used pay as you go sims and I worked out it was eating alot of her income to do so. So I looked into getting a sim only pay monthly tariff and am now paying for her calls on this basis and have been for 7 months.
It was 50 mins and 100 texts for a £5 but I have just called and got a new tariff of 100 mins and 3000(!) texts for a £5. I was prompted to call and change the rate, as her recent bills have been climbing above £30.
Anyhow - I am not sure she is paying much attention to usage she has a tendency to tuck her head in the sand when money is involved and so when the phone was operated on a pay as you go basis she was constrained from using the phone when she had no money. Obviously now these restraints are removed and we are now paying the price.
I don't think it is deliberate and she has just moved to a new flat and I have had some time in hospital and she stayed here for 2 weeks to look after the children so I don't resent her or think she is deliberately taking the p.
BUT she did just text me to say that she had texted to enter a competiion to win £25k - which immediately made me sigh and wonder how much that text cost me [hmmm] - should I keep quiet and be glad that I can help Ma keep in contact and have more disposable cash - or do I need to act like her Mother again and try to get her to be more aware of call charges (which would probably end badly and she would be afraid to use the bloody thing)... arggh