Bestel/AS18734 Contact

Does anyone have a contact for Bestel/AS18734? We’ve been having peering issues with them on and off for a while now, and can’t seem to get any response through their contacts listed with ARIN or on PeeringDB. Calls to support are fruitless, with nobody knowing where to direct us.

Disregard. Shortly after emailing this out, we received word back.