I had a similar problem with my last RMA (first one was not a problem). I had to insist several times that AMD facilitate shipping both ways before they agreed to it. Just make it clear you are not going away and escalate it as required.
Asking you to pay more money to receive a working product when they are knowingly allowing faulty ones to be sold is unacceptable. I had to make that argument very clear before my representative agreed to ship both ways.
Finally 1 of 2 mailing workers, answer my email ,were i show the mail that tecnical service say i mut send by ups for not cost transport, and he is agree with that. The other and first worker, i mailing never answer my question...
Wile some worker do their work, another hope some mate do his work too
At next day, ups messenger pick the parcel, 2 weeks almost waiting for this day , lol...