Calling me telling me that my computer was hacked

 

My Complaint: The above company called me and told me that there was a lot of email being sent from my account and that I was hacked. They cleaned my computer and cleared many viruses. No one had said anything about my e mail being fraudulent. Last time I had my computer guy here he said ‘no viruses.
I believed the guy on the phone and paid $125.00 for the service. Now they keep calling asking if I need more help. Finally I asked that they not call anymore. A friend told me it’s a scam, but I don’t know how to check it out. Can you help?

 

My Demand: Is this a scam?