When you tried to contact an authorized Apple presence in Sri Lanka for Support,
did you go through the Apple Support site said to represent Sri Lanka from here?
• Choose your country or region - Apple Support:
https://www.apple.com/support/country/
Sri Lanka
https://www.apple.com/lk/support/
Some regions and countries do not yet have an in-country official Apple presence,
instead they rely on authorized representative independent business relationships
for the sales, service, training and consulting aspects in those locations.
Does this link give you options in your area? (some may be limited or redirect)
https://getsupport.apple.com/
Outside of your region or country, other independent authorized Apple service
repair and support businesses may be able to help; if not for the distances &/or
other costs (involving product shipping, customs, fees, tariff, tax, & etc) accrued.
You may contact other independent Apple related businesses in another country
to see if there are any restrictions on their doing business or helping you there.
• Apple - Legal - Sales and Support:
https://www.apple.com/legal/sales-support/
(Some products have regional or country limits per legal agreement, so those may
be of consequence depending on the product &/or service, support, etc you seek.)
Sorry to not be of much help in this matter. Most replies here are by fellow product
users and not representative of Apple; this is a peer-to-peer user discussions site.
In any event...
Good luck & happy computing! 🙂