Have to add to this that the maid has shafted me properly twice in the past two weeks and I've been a regular for most of the year, so you're not alone OP. As others have said, they wipe the phone, sooooo...
I must say, both times I wanted to do half hour, so that may have been why, but even so, it was seriously frustrating. But I do really enjoy her service when I'm there and it's only twice in the last fortnight out of many many visits this year that I've had to deal with poor phone service.
It's particularly fucking annoying because there aren't very many Plan Bs in that region, especially not for that price anyway.
Both times I ended trying new SPs later in the day, who were both brilliant (reviews to come), so not a massive loss, but it's wasted time and energy I'll never get back.