I had the same experience with Renaissance Seeds of Love (their full name) this spring. Couldn't get any answer by email or text multiple times and their voicemail box was full and not accepting any messages. I finally contacted Paypal and got a refund. Paypal said Renaissance Seeds' account was "warning," meaning Paypal was experiencing many complaints and requests for refunds.
I was lucky to be able to find the seeds at Tomato Growers Supply (highly recommended - very wide selection and reliable and prompt shipping). Also had a good experience with seeds from Urban Farmer.
I hope Renaissance Seeds is ok and wish them the best recovering from whatever problems they've been experiencing, but I'd recommend not ordering from them unless you message them first asking to confirm they will ship right away and you get a reply. If no reply, don't order.