Trending @Capgemini; Two UANs and PFs account!

I have two UANs and PF accounts, one UAN MOBILE number not sync and other which is used current company. Help required to include mobile number and kyc for unused uan and pf account (fyi-this pf account tied up company was closed could not connect for syncing and current company is not helping to fix). Post this fix, I could merge both and keep one. Any suggestions or directions to fix this, could help !