A beautician has claimed that a Morrisons delivery driver tracked her down online hours after dropping off her shopping.
Molly claimed the worker contacted her on Facebook and even "liked" several of her pictures until she blocked him.
However, the 28-year-old claimed that Morrisons didn't initially take her concerns seriously when she complained about the "scary" personal approached.
Molly also put a complaint to Ocado - who does the deliveries for Morrisons - and both firms have now promised to carry out an investigation.
The beautician from Northfield, in outer South Birmingham, made the online order last month and it was then delivered by the driver.
Molly told Birmingham Live : "When he delivered the shopping he was pleasant, absolutely fine and said thanks for shopping with us. He brought the shopping up to my flat and I said 'thank you'.
"It was a very small conversation we had."
Yet six hours later she says she was horrified to discover the driver had apparently tracked her down on Facebook - and sent her a personal message.
He had also seemingly been looking through her pictures.
She said: "He delivered the shopping to me and then later looked up my name on social media and tried to message me.
"He just said 'Hi' then started liking photographs of me on my Facebook page, which to me insinuates something else.
"It's obviously a massive data breach.
"I live on my own, I'm a young lady. It is really scary.
"I called Morrisons but they seemed disinterested and said 'Maybe somebody will call you back about this'."
She looked up the driver online and claims he also works as a part-time taxi cabbie.
"In his Facebook bio it said he was also a taxi driver," she said.
"I thought, 'if you're doing that with me, what are you doing with the girls in your car?'."
Yet Molly claims Morrisons was initially dismissive of her complaint.
She said: "I just felt that Morrisons didn't take it seriously at all.
"For him to take my name from my order and look me up on social media and contact me and like photographs of me... it's just unreal.
"But it's really scary that Morrisons didn't take it as seriously as I thought they should after I sent them copies of the messages.
"Morrisons did not even apologise that this happened to me. I said, 'You haven't even apologised' and they said, 'Yeah well it isn't really a customer service problem'.
"I said that it IS a customer service problem.
"It's obviously a massive data breach but Morrisons said it was a problem for the depot they use which they said was also used by Ocado."
She had also now contacted Ocado, who are contracted to deliver for the supermarket.
"Ocado were really good but said that because the order was through Morrisons, there was not much they could do.
"The company said they would get in touch with the depot and let them know what had happened. But Morrisons, frankly, couldn't give a crap."
She added: "It's the first time that I have ever ordered from Morrisons. I told them I was deeply disgusted that they were not doing anything about this."
Morrisons said: "We take complaints such as these very seriously and we are working closely with our partner Ocado to conduct a formal investigation into the matter."
In a statement, Ocado said: "We are aware of this complaint and in the process of conducting an investigation.”
