Watch out for hidden fuel charges

Car was fine, no issues. Was a bit confused about drop off (picked up in Hertz spot but was a Dollar rental, not sure where to drop off but figured it out) However when we arrived home found I was charged and extra $25 for fuel. We filled it to full 1km from the airport and have photo proof that the gauge was full. Took about 40 minutes of calling and emailing to try to get this sorted. This was already charged to my credit card without any consultation with me. Still waiting for resolution.