We buy any car, Saga and Sports Direct were fined for sending unwelcome "frustrating " messages, the UK data watchdog said.
The three companies were fined a total of £ 495,000 for having sent hundreds of millions of emails and texts.
None of the companies had obtained permission to send the marketing, the Information Commissioner's Office (ICO) said.
The nuisance messages were all sent before April 2020, the watchdog added.
"Getting pinged your phone or constant spam messages on your laptop from a business you don't want to hear is frustrating and intrusive "said Andy Curry, ICO 's head of investigations.
" These companies should have known better. "
We're buying it Car was fined £ 200,000 for sending over 191 million emails in the year from April 2019 to people who requested an assessment online from their car.
The first emails sent by We Buy Any Car complied with the law, the ICO said, but follow-up marketing emails were sent without consent. The companyalso sent 36 million unwelcome text messages.
Two Saga companies that focus on services, including insurance and vacations for people over 50 have been fined total of £ 225,000. The companies tasked third-party companies between November 2018 and May 2019 to send more than 156 million emails.
The third-party companies used lists of people who did not have allowed companies to contact them.
"This was a historic violation of email marketing regulations with respect to business with two third-party vendors of Saga Personal Finance and Saga Services "said a spokesperson for the company.
" In light of this, we made the decision to stop using third parties for email marketing purposes and we have worked closely with the ICO throughout their investigation. We are confident in the soundness ofe our privacy and marketing protocols. "
Sports Direct has been fined £ 70,000 after sending 2.5 million emails to people it doesn't. had not contacted for some time. The company could not prove that it had consent to do so.
We buy any car and Sports Direct has been contacted for comments.
The ICO has been accused of a post-Brexit upheaval in data rules , including the removal of cookie pop-ups.
The digital secretary, Oliver Dowden, said he promotes "light touch " "data regulation.