Harrassment & undeserved behaviour

I got missed calls on my work landline from CreditWorx until 4 days later they called on my cell. The lady tells me which company she works for then asks me to verify my personal details. Obviously I said no as I never dealt with the company and don't owe anybody anything. Reasonably, I asked what the reason for the call is and which company she's representing. I did not give them or any company any aurhority to give out any of my details. When I asked she decided to drop my call. This sounds like a **** to me.