I know a company that also ignores both e-mail and facebook messaging, so they don't get my business. If I have to phone the shop, I feel under pressure to buy and I don't like that if I'm making inquiries.
One time I phoned the shop to ask for details about an item and they texted and rang me non-stop through working hours and completely lost their professionalism when I didn't reply within 2 hours.
I always consider myself a potential customer, as I've owned over 50 instruments, but it still has to be my decision and I hate pressure sales.
I've found a shop that always replies to me and they're very patient, so I'll keep going back.