BUYER CHECKOUT ISSUE

Hi

I've exhausted all options. I have had an ongoing checkout issue with buyers.
Our items are large and bulk with freight calculated seperately. Buyer go to purchase and they get an error message "The item can't be purchased becuase the seller hasn't specified freight/delivery charges, contact the seller or assistance" There is no order processed for us to do this to add on the quoted freight charges.

The only way our buyers can purchase, is by us sending them a manual offer and force the sale through to checkout. This started happening in December 2020.

I have raised this multiple times with chat agents and they don't do anything. I've repeatidly asked for the matter to be escalated and nothing. The agents then purposly disconnect the chat and the transcript reflects that I exited the chat, which has not been the case. It's just too hard for them to resolve or they have no other avenues. There are no numbers to call for support.

Our buyers have been very helpful in sending through screen shots, I've emailed to customerhelp_au@ebay.com but this appears to be unmanned. No contact phone numbers or support provided in Australia any more. 

Any help would be appreciated cause none is coming from ebay.
Geoff