What to do when someone asks you to re-send videos multiple times?

[bosco]

I had a guy buy videos from me, I sent him a download link THREE times, and he said none of them worked. He asked me again to re-send them, but I feel like he might be sharing the links with other people.

I use camredeem.com to host my videos.

Should i just ignore him? Nobodies ever had problems downloading them... ?