Stopped receiving SMS from mobile device

I have purchased a couple of mobile numbers and I use code similar to the following. This has stopped working suddenly today for both the devices.
I am wondering if something has changed.

***hologram=HologramCloud(dict(), network=‘cellular’) ***
hologram.enableSMS ***
recv=None ***
cmd=None
recv = hologram.popReceivedSMS()
*** if recv is not None:

*** print ‘Received SMS:’, recv

After one day of not receiving messages, above code is working fine.
These messages were shown up on dashboard and they, however, were not received at the following line.
recv = hologram.popReceivedSMS()

Same thing happened two different phone numbers.