This is possible to be the issue your are facing if you were dealing in fiat and depending on the time you were sending if the operators have gone for weekend or holiday for few days, anything on this could be possible.
What are you trying to say or what point do you want to make?
Are you almost confirming what I said or what?
I see that the topic has not been updated for more than 10 days, Coinbase is a popular platform and the user did not update that he was scammed despite being active, we can say that his problem has been solved and there is no need for more hypotheses about it.