"My customers, they're the ones that should be targeted rather than my company," he said. "We are a telecom provider, so we provide dialling capacity.
"What people do with that is up to them - of course, the bulk of it is telemarketing calls.”
You seriously believe that you hold no responsibility for this at all?
If your customers are doing things that aren't legal and are using your platform then sorry pal but you are responsible.
Did you not look into the legal side of things before you starting offering your dialling capacity to these people?