What are our options to be compensated for poor service, humilation, and putting our health in danger? Selling a unit to us full of human feces.

We bought a 2004 used camper from dealer. After we agreed on a price and payed for the unit. Joe Bubnich (owner/salesman)verified they would check over the whole unit. Meaning wheel bearings, appliances, and winterization, along with making sure everything works properly and that we have all power cords and equipment needed for this unit. When delivered to us they told us everything was checked, cleaned and all equipment with unit. One propane tank don't work and neither one of the two tanks have been inspected in the last 5 years. We go to set up and de winterize our unit for first time in Tennessee. My fiance opened up the septic cap to hook septic hose and she got here feet, hands, and arms full of human feces. I also got it al over me trying to get the hose on while the feces was pouring out a 4 inch pipe. Humiliating and disgusting. Other campers witnessed this. We spend 2hrs. Cleaning crap up. Then very rude and unprofessional when we confronted him about it over the telephone.