KBG

Hi, I had help with my website design from a colleague who initially set up the contact form to go to her email address. When the site went live, I changed the email address linked with the contact form and started receiving the emails absolutely fine. Then suddenly last week, she started receiving them again though nothing has been changed on the site as far as I can see. Only I have access now and I have not changed anything. Any ideas what has gone wrong and how I can change it back please? I cannot see her email address anywhere in the site settings. Very strange