Harassment of non account holder

For the past 2 months I have been getting phone calls from Home Choice consultants asking to speak to someone that is not me, about an account and debt that is not mine. I receive up to 10 phone calls every single day from Home Choice about this. I have had more people than I can count telling me that they will investigate this and remove my number, but nothing. I have phoned their customer service on multiple occasions and have been promised that this will be resolved yet the phone calls keep coming in. I have spent hours of my time and a lot of money on phone calls trying to get this company to stop harassing me, but to no avail. I do NOT have an account with them and have NEVER bought anything from them. The person they look for on my number is NOT me!

It looks as if my only option to stop this will be to either approach the relevant ombudsman, or a lawyer, as it amounts to absolute harassment what Home Choice has been putting me through.