Had a similar experience this June/July in Majorca. There was 5 of us so booked a minbus. No problem with arrival the minibus was just for the 5 of us. When it came time to go home a minbus arrived at our hotel and it allready had 2 women on board. I argued with the driver about the fact we had paid for the entire minibus to ourselves, but got nowhere. Then the minibus proceeded to make another 3 collections on the way to the airport.
So if everyone on that bus paid for a taxi the company was raking it in. We complained to travelrepublic who we booked with but as per usual no reply from them. So yes it looks like they are scamming us.
We are away again in October (already booked with travelrepublic months ago) but this time only 2 of us, the taxi is booked form Girona to Llorett DeMar, never been there before.
I think you'll enjoy lloret, ive been a couple of times in last 4 years. You MUST try the cocktails at the bar on the beach, its at the top end near the roundabout. Fantastic.
Another couple of bars we enjoyed were the rabbie burns ( scottish pub obviously) and baileys irish pub.
The main strip in lloret is fairly boisterous at night, nightclubs and bars up and down both sides. If your after a quieter evening, head to the Fennels area, it's about a mile on from lloret. Cost about 5 euros in taxi. There's some really lovely restaurants in that area, and a Chinese that does 4 courses for 10 euros and is superb.
What's the hotel name your staying at?