Delete Customers telephone and email addresses cmd_ei_api=>

Good day

Can anyone assist me. I have created an abap program to edit customer telephone and email details using the class cmd_ei_api=>. However i first need to delete all the telephone numbers for that customer who is being edit if they have any but im failing to do so using

cmd_ei_api=>maintain. Can you please assist with links or other ideas or samples on how i can acheive this.

Thank you in advance

Thomas