Not receiving texts while overseas and can't login to my Ultra Mobile account online

I had this working fine while I was overseas in Asia earlier this year. I have an ongoing Ultra Mobile account and have been paying 2 cents per text sent and received while overseas.

I went back to the states for a couple of months and now I'm back in Asia. I can send texts (USA number to USA number, while overseas) just fine but I haven't been receiving any. Been playing around with settings, turning airplane mode on and off, restarting my phone, everything I can think of.

I tried to log on to my Ultra Mobile account so I could speak to a CSR but I can't log in there. It's either giving me an error message while trying to log in, or telling me that my phone number or password is incorrect, which it's not. I also can't have Ultra Mobile text me a login link for the reasons already stated.

Pretty stuck here.