Stands for "shake my head" so I guess something has not gone well?
If you need to contact CS or make a complaint you can find details here http://www.o2.co.uk/contactus otherwise, we might be able to help?
Pleased you know these abbreviations @MI5 I have never heard of it if honest...? Never mind Good advice. I hope @Anonymous comes back to the thread...
*The Game Is On*
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