Migrate your account to another server. Your followers will also move along with it.
I see. A year ago it didn't look like it was fully supported
big servers are being roasted by ahem, unusual traffic demands. use a smaller server and make a monetary contribution to your admin if you find value in their offerings, as a way of saying thanks.
There are two servers run by the Mastodon gGmbh itself (m.s and m.o) and they've been taxed with the load of unexpected virality.