Samsung phone locked after upgrade

I bought a Samsung note 10, 18 December 2019. Transferred all my files and apps and did a software upgrade. Now phone asking for a password - I never had a password on this phone!! When you contact support they say: take device to a service center!! Nothing in the manual.. I work in West Africa and do not have my receipt for phone with me. I now have to pay to get it fixed even though the problem is from Samsung!! I checked the net and a lot of people having same problem after software upgrade. Samsung has no solution. Pathetic!! Next time I will look at a brand that actually supports its own products! #samsungsucks