Ex-WWE Star Razor Ramon -- I'm No Scam Artist

Scott Hall (aka Razor Ramon) and his old wrestling pal Jake "The Snake" Roberts insist they're NOT running a scheme to bilk thousands of dollars from fans ... despite allegations to the contrary.

The former WWF (now WWE) greats have been taking heat (along with their mentor Diamond Dallas Page) after asking fans to donate cash to help pay for various medical expenses. As part of the deal, Scott and Jake promised different "perks" for donors -- in the form of autographs, shirts, phone calls, video chats, etc.

But some fans claimed Jake and Scott took the money and NEVER came through with the perks ... and they began bombarding the wrestlers with hate mail.

TMZ Sports spoke with Jake who tells us there's a perfectly good explanation -- he simply doesn't move as quickly as he used to.

"We're very thankful for all the fans who supported us. It's an ongoing process and we didn't realize how much work it would be (to make sure everyone got their perk)."

"However, it doesn’t matter how long it takes, we will get all of them done," Jake says ... adding, "Remember, we ain't secretaries (HAHA no disrespect to secretaries)."