Who called from the number +1 (888) 270-0652

I am a lawyer. The people at this number claim to be from the Meridian Group and claim to be a service to serve legal papers. They claim their fax is 951-253-3349. No one at this number would agree to provide an address for the business claiming I was not to be trusted with their address. I wanted their address to provide a letter of representation and an explanation to stop trying to contact my client directly. One man told me he was Roland Whitman, but still refused to provide an address. The first man claimed this business was in Plymouth, Montana. While he was on the phone I checked and there is no Plymouth, MT and so I asked for his zip code, which he refused to provide saying I didn't need it. When asked how many employees they had he refused to provide any information about the company, again claiming I didn't need it. Fraud? Or just really unprofessional?

They just called my SO , lvm asking for me (in my maiden name from 2016). No company name, no last name, no specifics. It sounded like an untrained woman calling from her bed after just waking up " Hello this is sarah calling to follow up on a complaint filed in our office for ----- jones. ----- jones must contact the department at 888-270-0652 and reference P175201911478. Call before end of business day". Sorry 'Sara', that's going to be a no....