Pre-paid back in the UK for a car with a tank of fuel for 2 days at San Juan and picked up yesterday.

For some reason, they have given me an invoice in German.
On checking my credit card balance this morning, I've noticed something like £342 / $525 has gone out.

The invoice says:

Zeit & Entfernung Tag 38.94 X 2 77.88
Zeit & Entfernung Stunde 13.00 X 0.00
Zeit & Entfernung WOCHE 175.74 X 0.00
Betankungsservicegebuhr Gallone 5.40 X 0.00

What they seem to have done is taken 2 days off at $77.88 = $155 + 2 weeks at $175 = $350. So $525?

The $77 bit is pretty much the £49 I paid for the car.

Have they completely screwed up, taken me for a sucker or what?