Good, God! Me, too. I used to have a pet sitting business (2 years ago) so I suppose that is why they are calling me, but I've been getting calls all week. Driving me nuts.
Some call center I suspect--a Telemarketers or Collection Agency. I suspect agency since I am a business and they are NOT allowed to call you at your workplace unless they know you are the owner. They hung up.
Credit card processing center, trying to get your business to use their service to process your credit card transactions. They leave a toll free number to call or press another digit to be connected to a associate.