This company was started because the founder didn't like eBay. Well, eBay blows Reverb away if you have any sort of problem as a buyer. Reverb support basically puts you out on your own to deal with scammers on their marketplace. They do not answer the phone, it's only a recording to go to their live chat, which is hardly staffed and is mainly a bot. If you do get someone on chat they push you to email, and they do not respond to emails for days.
Take my advice and realize that if you use Reverb, you are essentially gambling. If you have a good seller, you are good, but if you encounter one of the many scammers on this site you are on your own. I suggest sticking with the pros at eBay who have 1000x better support.