I have a Samsung UN50M5300 smart tv.

I put one wrong letter in at the end when I registered my portal url. I know where to change it, however I can't seem to get any keyboard to work with the tv. I tried numerous wireless of different brands, 3 wired. I got one wired one to work with the arrows and number pad but nothing else. I also tried numerous apps but the tv isn't compatible. I don't think there is a way to get an on screen keyboard either?

Is there a certain keyboard that will work? For wireless I tried a cheap Walmart one a Logitech, Microsoft, and some other Jobber.