Sky phone showing two numbers when I call

[TompoL]

Hi,

about a year ago I switched from iii mobile to Sky mobile after 15 or so years.

i wanted to take my old number with me.

after three days it seemed to switch to my iii numbers.

however, some of my friends are saying messages are coming thru from me with the number sky sent with the new mobile causing embarassment as friends thinking I've two phones. What can I do?

thanks in advance. 

[caesarome]

@TompoL 

Have you gone into the settings on your phone to see if it showing the correct number because of it is wrong it will need changing.