The reason you got nothing, is because the person you were speaking to has no idea as to whether the problem is completely resolved, or not. They are not in the Maintenance team, nor the Field Service team, and they have no idea, so cannot answer you. Kinda like going to college for physics and calculus, and asking why the earth is round. Getting a credit means either talking to someone in billing, they are not going to have ANY information on technical issues, or someone in tech support tier 1, THEY can help you with your service specifically. If you ask to be escalated to CAG, someone there MAY have access to further information because they have more access in the system, but again, since they are not in the field, they may not be able to provide you a definitive answer.