Someone parked in both of my reserved parking spots should I have it towed?

Earlier today when my wife got back from work she found someone parked in her reserved parking spot so she had to park Down the street. We went to dinner and he moved his car to my reserved spot and I had to park far down the street. I tried texting my neighbors to see if they know whose car it is but haven’t heard anything. Both spots are marked reserved on the pavement. Should I call the towing company?