Regional bank customers are heading to Parliament House to appeal to crossbench senators, making short pitches on their plight to support a bill to extend the time the royal commission spends on regional lending.

Just four farmers spoke at the banking royal commission's hearings into farming issues in Brisbane and Darwin last month.

Tanya Hargraves was not one of them.

She ended up losing her farm just outside Canberra, commercial properties and her business.

"They took my income, they destroyed my business. I'm trying to get back on top again, at least survive...I've moved house," she said.