This is an awkward sentence in English. What exactly does it mean?
Probably means something like "Customer Service wasn't able to help me with my problem when I contacted them."
I know this was three years ago, but it makes me think of, for example, emergency services
Is it possible to write: "The services weren´t able to help."?
Probably. Did you submit it? DL usually accepts alternative translations I've submitted; it often takes some time to get feedback, though, especially from the German group.