You reversed polarity where?
If you have a surge protector plugged into the pedestal and it has a red light on, it is an issue with the pedestal and it's connections.
Are you still parked in the same spot? Have you had anyone knowledgeable look at your RV's electrical system?
If the DISH system is the root of your electrical problems, remove it from your RV (after you unplug from the pedestal), call back the company and have it correctly installed.
I'd suggest you hire an experienced RV tech, a mobile guy, and have him look over your RV and the pedestal. This stuff isn't hard to figure out but you are way out of your depth and this could be a serious problem.