Reliance Industries — TDS deducted on dividend paid on shares in physical format but not reflected in 26AS

Tax at source was deducted on dividend paid during fy 20-21. These shares were in physical format at the time of payment of dividend. Subsequently, these were dematerialised after all documents were submitted to Karvy/Kfintech.
However, TDS is not appearing in 26AS . Since December 2020, I have sent number of mails to Karvy/Kfintech requesting them to update TDS in 26AS. However, in vain.
I have clearly mentioned that the above long pending issue needs to be closed immediately, for filing Tax Return for ay 21-22.
Though, evidence of TDS on dividend was enclosed with several reminders to Karvy/Kfintech, their latest response (we have not deducted tax on dividend) is very annoying and disgusting. Earlier, they had agreed to issue Form 16 on 28th September and this issue is also pending.