@Yvonne41 I've got it and I've got a headache so god only knows how you are feeling.
Airbnb will not release the additional deposit you take through the resolution center as its at airbnb's discretion to use it or not, just the same as your main listing deposit. In other words its no different to increasing the original listing damage deposit.
You have to stop asking for the $150 - $350 additional deposit through the resolution center and just rely on the main $350 deposit or increase it.
Unfotunately you were misinformed by customer service which is not unusual. You will have to fund repairs yourself just like the rest of us and if you are very lucky airbnb might payout a small amount on a claim sometime in the future.
ps. airbnb will only payout the second hand value of items at the time they were damaged.