<human>: This is the scoop:

I booked Vendor A last fall and Vendor A said they would send a few other vendors for potential Vendor B.

8/29 - I sent an email asking for the list of Vendor Bs and didn't receive a response.

9/22 - No response yet, so I followed up to re-ask for the list.

9/29 - Response received with one potential Vendor B and a commitment to send additional possible Vendor Bs. 

I look into Vendor B and it appears they are closely related, possibly even siblings. I ask a couple of other people what they think. They also say they appear to be siblings. Looking at their businesses online they appear to have personal photos of each other on their business pages. There was no disclosure about potential relationship.

It makes me feel a little funny so I email Vendor A to ask about Vendor B as well as potential other Vendors and to inquire about the relationship. I never received a response.

I already submitted a partial deposit, but its really starting to make me nervous. Like, a lot nervous. Its getting down to be five months and the lack of communication and transparency is just giving me anxiety.

I've already booked other Vendor Bs, but I'm wondering if I should go ahead and book another vendor A as well and cut my losses with the deposit.

Anyone? Advice? Am I being a bridezilla here? I think 72 hours is a fair time for turnaround. Disclosure about certain things?

Can you condense the text into three sentences or less?
<bot>: Vendor A recommended only one Vendor B that is possibly their sibling and their communication has been really spotty. Am I being unreasonable?