I hadn't paid for the hotel accomodation.

As I said earlier if your transit is above 12 hours it is the rule of the airlines to give you free accomodation it has nothing to do with your travel agents. In another case if your transit is less than 12 hrs and if you still like to have hotel accomodation then you should book and pay for the hotel fee.

Again, for transit over 12 hrs don't pay the travel agent, the accomodation is the courtesy of airlines. If your transit is less than 5 hours you will get nothing and if it is from 5-q2 they will give you food voucher, all courtesy of Qatar airlines.