MMS not working properly on my device

[sfetaz]

My friend sent me multiple pictures from her Verizon phone to my verizon 6700 which is currently running WM6. I got the indication of messages as well as the messages listed under MMS but they do not download, they stay in the downloading state for a long time (like days) then randomly I get a message receipt failed message. I have deleted all 4 messages she sent only for them to come back again days later, still not able to get the pictures she sent. What should I do?