Samsung Care for a Replacement Device?

Hello,

The galaxy z fold 4 I bought from Samsung education portal was broken in less than two weeks of usage. Then after some very painful and frustrating phone calls to Samsung and 6 weeks, they replaced the device with a new one. I'm concerned that there might be another problem with the phone. My questions are:

1. Does anyone have any success of buying samsung care+ for a replacement device, noting that it's been more than 30 days of purchase for the original device but I just received teh replacement device a few weeks ago?

2. I had 50% off offer when purchasing the original device for Samsung care+, has anyone had a success of getting the offer again for a replacement device?

Any other alternative or options? Appreciate your help, thank you.