Texts All Night

I have a British GSM (mobile phone) and use is for an alarm to wake me in the morning. The phone therefore is not used for anything else. In the arly hours of the morning there were text messages being sen tot it all night, five in all. A silly little tune is played when each one is recieved with the light coming on. Each time we were woken by this, but couldn 't switch it off as the alarm would not work. In the morning the texts were checked, they were all from mobile phone services in the UK offering promotions of credit deals!

Why five come at between 2:00 and 5:00 in the morning is a mystery!? No sleep and now very tired for the rest fo the day.