Waiting weeks for a response is new for me, I'd worry if I don't receive one after 5 minutes normally.
Unless it's a support chat, I really can't imagine it's realistic to expect a response within 5 minutes from any of big crypto exchanges. Do you have VIP status as a user since you usually get a response within 5 minutes?
Kcollins321, there is definitely something wrong here, it is impossible that you have lost as much as 80% of what you bought. Coinbase withdraw fee can not be more than few %, and if you transfer coins to Coinbase Pro (for free), withdraw fee is 0%.
Can you go to history page on your Coinbase account and check what exactly did you buy, for how much money, and what is the current amount of Bitcoin in your account? I’m pretty sure this is some misunderstanding of how things work, Coinbase isn’t exactly a charity, but they don’t take 80% on fees.