Router Return (Money back)

Hello,

I return the router when I finished the Cable internet with O2, they charged me 77,93€ anyways. I complained the situation by chat and they sent me an email confirming they started the process on 30 June and they will send me back the money. 3rd September and no money received. 

edit o2_Manga: verschoben von DSL: Router… zu Englisch Broadband.