US Immigration from Trinidad and Tobago

My B2 I94 is set to expire on the 30th August. My home country borders are closed and they have been repatriating citizens at a very slow rate only after you have been approved for an exemption to enter the country (the third repatriation flight from the US since boarders closed in March leaves tomorrow). Bottom line i applied for an extension (I 539) which was signed for by USCIS on the 14th August but i have not received any correspondence from them since. I have two question (1) how long does it take to get a receipt number (i am panicking that my I94 expires in a few days and i may be considered illegal without even so much as a receipt number (the payment has not even been taken from my credit card (2) does it make sense to refile online (i didn't realize it could have been done, thought at the time they were only accepting paper filing).

How long does it take to get a invoice number from NVC after petition has been forwarded to Department of State from USCIS.

hi does anyone knows how long does it take for nvc to review a document that was rejected and resubmitted? thanks

Anyone had an interview in Trinidad lately? My friend has an interview on August 14th 2020, and need some help.

I would like to petition for my brother who s in Trinidad. He s married and has a daughter with his wife and she has one from another marriage who s over 18. Do I file one I-130?