Is the Humane Society doing ok?

Seven days ago I filled out an application to foster a cat or small dog, but I haven't heard back from them. Tried calling them on the phone to follow up on that and ask if they needed any supplies, but was not able to get through to them. Left a message and waited a few days - same old same old - didn't hear back from em. Went to their website and decided to email them - apparently I was not on their whitelist(does that mean I'm blacklisted?), and while I was able to find and get them some stuff from their Amazon wishlist, I uh - I didn't hear back from them. Called them again yesterday and this time the phone didn't even go to voice mail.

Are they simply overwhelmed with work, or am I somehow a persona non grata with the Humane Society? I donated supplies and volunteered for them in another state but had to stop volunteering because Covid broke out and I caught it - though I can't imagine that would blacklist me. I want to foster a cat or small dog cause I imagine Helene left a lot of pets needing homes, but if I can't get in touch with the Humane Society I can't foster. Should I wait a few days? Are there any other shelters nearby that offer foster programs?