Anyone else had them trting to pull your pants down recently,

Got an online account,
Latest bill came through £45 over normal average price,
So rings up and they are investingating
Also asked wether upgraded phone i have recieved (free upgrade) can be used abroad
O2 - "That is subject to a £100 deposit that will get paid back in 3 month"
I have never had to pay a deposit to take a phone abroad, and wont be doing this time either.

Ive got a feeling they want to nudge something up my poo tube