What to do when both parties ?

Had a car accident. young man ran red light, may have been intoxicated. My car had been paid off, so I was free of any car note. My car and the other party are insured by same carrier (nationwide). first thing I found out was I did not have rental car coverage. But the claims person said the other party did so his coverage would pay for rental. when I went to get a car at the rental place (enterpise), the car given to me was too small for my body type, to get a car I then had to pay $5 a day for a car that was comfortable due to my weight. Without any formal notice I was called told that a check for $5000 was being sent, that I had to turn the rental in immediately or pay $30 per day rental. Have not received any money yet? What is my recourse here?