'It's unfortunate': Melbourne cafe owners hit back at customer who blasted them online for surcharge 'mistake'

The owners of a Melbourne cafe bombarded with threats for appearing to charge an extra dollar to have a customer's muffin heated up have broken their silence.

Psychic Medium and self-proclaimed motivational speaker Peter Williams recently dined at Leaf and Vine cafe in Melbourne's east, before taking to social media to call out the small business to his 26,000 followers.

"I had walked out and asked for the receipt and found out that I had been charged $1 to heat the muffin, which just left a real, bitter taste in my mouth," Williams posted in a video on Facebook.

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"I was having a fantastic time, all until that very moment that I got the receipt.

"I wasn't in a space or position to argue for it."

It may have only been a raspberry white chocolate muffin, but it's left cafe owners Bec and Pete Murray feeling the heat.

They put the surcharge down to "human error" and said they were "disappointed" Williams named and shamed the family business without approaching them about the issue.

"It was a mistake made by someone who was in training," Mrs Murray said.

"We don't charge to heat up a muffin. We never will and we never have."

The couple, who have run the Ringwood cafe for the past decade, said pre-loaded items in the register were to blame.

"We have at least 2000 options on the register," Mrs Murray said.

"Those 2000 items don't always work to plan, in this instance this one had a surcharge attached to it but it shouldn't have."

They claim they "would have given (Williams) the whole bill off" had he brought the surcharge to their attention.

"It's unfortunate that when I contacted (Williams), he took six hours to reply to me after watching the plethora of a snow storm of comments on social media damning us," Mrs Murray said.

A Current Affair reached out to Williams, who declined to be interviewed.