Sasha Armastus

I wasn't having many problems before when I teleported to a different area but now it seems like every other time I get "logged out of SL", how do I fix it? Plus, I get logged out when I am just standing and talking to others. I've tried to research the issue, but I just got lost with all the other information. It's been really frustrating. How can I fix it? TIA

I just bought some items on marketplace and haven't received them. What should I do?