I've seen so many so called Phoenix companies (https://en.wikipedia.org/wiki/Phoenix_company) spun up out of the ashes of "insolvent" companies that leave behind unpaid employees, suppliers etc that it doesn't surprise me nobody has caught up with the ad sales guy.

This guy is ridiculously easy to find on the Companies House website if anybody else wants to avoid doing business with him. All five of his registered companies are dissolved:

https://beta.companieshouse.gov.uk/officers/bJDe8K2KIPyGpgvp...