After grand promises, I entrusted Yell with my company's business. Not only was no result achieved from the campaign, its start was delayed by months, but mistakes were repeatedly made, ads didn't appear, and none of the regular reviews and adjustments actually happened. I cancelled the campaign and went to a smaller digital marketing business that's now turning in great results. I continued to receive emails from Yell for months before finally managing to get an unsubscribe to work. Now they've started spamming me on an unrelated e-mail address. The messages have no unsubscribe option, and Yell refuse to remove me from their list. I have put in a complaint to the Information Commissioner's Office. Avoid this unprofessional bunch of charlatans at all costs.