update the chartstring of your merchant id
Complete the steps below.
You will first be asked to authenticate your UNI and password. After authentication, the Merchant Account Request page will appear as below.
2) Read the guidelines at the top of the page carefully. Then begin completing the form under the "Contact Information" section.
3) From the drop-down menu under "Type of Request," choose "Update or Close an Existing Merchant Account."
4) In the list of checkboxes under "General Information," choose "Update Chartstring for Existing MID."
5) Complete the rest of the request form.
6) When you are finished, click the blue "Order Now" button at the bottom of the page: