Replies from landlords

I have been trying to get in touch with OpenRent on varies platforms (call, email, facebook) with no response.
I have sent nearly 70 messages out to landlords asking for a viewing and I’m yet to receive a single response. One landlord I found via a different source and spoke with them directly and said that they hadn’t received a message from me on openrent (even showed me their account showing no messages from my account).
Can someone please tell me if this is an issue anyone else has been experiencing or if someone from openrent could please check my account to see if this is a problem?
Thank you