homechoice poor customer service

i received an sms from homechoice stating i have changed my cellphone number which i did not, i called homechoice to inquire about the sms and im told theres nothing they can do and the lady was so irritated, how can my number change without my concern and i gave the lady my id number and she told me she cant do anything because i have to confirm my cellphone number and all this happens immediately after someone calls from homechoice asking if i want to buy/order anything..