Arencia paid collaboration: no reply? Mass email?

I got this paid collaboration from Arencia at the end of May but they haven’t replied to my reply or follow up email. They told me to send them their media kit wi the my rates but since it’s my first one, I wanted to make sure I wasn’t underselling myself. I replied to discuss on our collaboration further and if they could share their budget so I can make appropriate rates depending on the deliverables they want. Since it’s been about 2 weeks and no reply, I’m starting to think if it was a mass email to potential influencers as they didn’t mention my name. Also, their email ends in @arencia.com so I’m sure it’s legit. What should I do?? Should I send them my media kit if they still don’t reply?