Well, in my opinion "sucks" is a rather negatively charged word to describe slower than expected shipping service and less than polite customer complaint response.

Usually, when I'm disappointed with what I'm hearing back from a service representative I ask to speak with their supervisor if I'm still not satisfied.

That reminds me, I still haven't heard back from that used bookseller who was supposed to send me MY f****ing order a month ago!

Cheerily,
Charley Noble, whose house fortunately did not burn down this morning in spite of all the smoke alarms from upstairs