A couple said they "went cold" when they realised scammers had stolen £20,000 from their bank account.
Lorna and Brian Young were targeted by fraudsters who pretended to be working for Credit Suisse.
Scammers, who usually clone the company's website, try to convince people to invest with their company before stealing their money.
The fraud, which was documented in BBC One show Rip Off Britain, also targeted Mrs and Mr Young, who invested £20,000 into the website.
But after watching the TV series, the couple were shocked when they understood they had lost their money.
Speaking to Rip Off Britain, Mrs Young said they were "gobsmacked".
She said: "When we saw the Rip off Britain programme, it was a terrible shock.
"Absolutely, I went cold. I couldn’t understand what I was seeing.
"I mean we were gobsmacked."
The woman and her husband contacted the bank about the investment but said the resolution process was slow.
Rip Off Britain then put them in touch with fraud specialist Richard Emery, who helped them get their money back.
Mrs Young said the BBC programme saved their money after the elaborate fraud.
Another man was targeted by the same scam and invested £25,000 before realising what had happened.
Nigel Greenwood from Lichfield, Staffordshire, said scammers impersonated Credit Suisse staff and convinced him to invest with the website.
He said: "My heart just sank. The world just swallowed me up."
Earlier this week, The Mirror revealed that criminals are using the Carphone Warehouse brand to access people's accounts and defraud them out of their money.
Mirror Money has heard from dozens of people who have received unsolicited calls from fraudsters purporting to be from the retailer – offering tariff discounts, early upgrades and alleging that they have won a competition.
In many cases, the customers said they blocked the number, only to be called hours later from another landline associated with a different call centre using the same script.
In one case, a woman received 14 calls in one day.
“They are relentless,” Lorraine, who is actually a Three customer, told The Mirror.
"The scammers are awful. I hung up and blocked them but they just called again using another number. It's worrying as while I didn't fall for it, some people out there could."
