Hosting Not reliable , not even secure .

Hosting Not reliable , not even secure .

My clients mail get hack ,they said is my clients computer kena virus, ok fine, if like what they said, how come web mail host at shinjiru kena hack, but other website webmail(same client) host at the other company still safe. they never fix it and said is my client computer issue.
they sent mail and reply cancel in 24 hours, my contract end in nov.