Thanks so much for the encouraging and spiritful reply, my concerns as I verbally spoke on phone to my HR and Dept Manager:Hi Abrar,
For reference letters, they are asking for a different one for each position that you held with the same organisation. You may either try to request the company to provide the same or ask different individuals in the company to provide that.
For rest of the evidences - bank statement, payslip, tax document (your), make an attempt to get what all you can.
Finally, add a LOE explaining your efforts to get requested ADR info with evidences such as email correspondence to banks/company and official gov instructions wrt the current Covid19 situation in your region and request either to consider & process the application with whatever you have submitted or ask additional time to respond.
I think that's the best you can do in current scenario. Others may pitch in with their suggestions.
Don't worry; Hope things will turn out good for you.
All the best!!
-> NO viability of any more reference letters due to lockdown situation reason being all office support such as letterheads, printers, stamp/seal etc not accessible
-> Even banks in the country I am currently in (Saudi Arabia) have fully closed down on govt. orders for an indefinite period.
I got still 12 days to respond, hopefully I can manage some turnaround; stay blessed and be safe. Any members valuable advice are welcomed.