I’m a teacher and have been living here in Dubai for a year. I was away for the summer (almost 7 weeks in total) and cleared out my fridge and shut my power off at the mains in my apartment. Upon my return I have received the highest DEWA bill since moving here!  Do you know what I can do to rectify this as clearly my meters aren’t being checked.

I would suggest you submit your complaint to DEWA on-line as they have an on-line complaints section when your consumption is too high or actually go to the DEWA office with all your bills and let them explain it to you.