I called back the number (02) 9647 6967 and reached vm that said the company name is RAMS

Caller: Rams - "Tim"

I foolishly gave my real phone number to a real estate agent, at an open house, and since then have been spammed by similar numbers. This last caller at least left a text message even though the text could not be returned with an appropriately rude message. Rams assume I want a home loan, I guess, because I toured an open home. These Rams calls not only intrusive but pointless, since I never answer or ring back unknown numbers, and are infuriating, making me think Rams is a dodgy operator with shady practices.