S21 plus BTU still stuck on November 1 security patch after leaving UI4 Beta

[Onelove]

Left the Beta programme a while ago, downloaded the official version of Android 12 but now unable to download December security patch for S21plus as the OTA keeps telling me that I have the current software, which is the security patch for November 1. How do I get my phone and the latest updates back since leaving the UI4 Beta. I'm unable to update my phone to the latest security patch for December 1 using the phone's OTA software update. 

Any help would be greatly appreciated. 

Thanks. 

Onelove

[Pugs1957]

Samsung update servers have gone wonky. Hopefully they will be running properly soon.

[GalaxyA51user]

Use Odin and update your phone from PC. Firmware and tutorial at Sammobile.com. Use BTU csc.