LeoVegas Gaming Ltd.’s misleading ads and its failure to protect vulnerable customers have left a £600,000 ($818,000) hole in the company’s pocket.

On Wednesday, the UK Gambling Commission (UKGC) meted the Swedish mobile gambling specialist with a hefty fine “for failings relating to misleading advertising and the handling of customers at the end of their self-exclusion period.”

During its investigation, the British gambling regulator discovered that LeoVegas did not “take all reasonable steps” to prevent problem gamblers from accessing its offerings.

“Our investigation found, and LeoVegas accept, that that there were weaknesses in its systems relating to the proper management of self-exclusions, and it and its affiliates’ marketing material was non-compliant,” UKGC Chief Executive Neil McArthur said in a statement.