My debit number has changed

How to change it or number I can call for customer support 
Hello Steven. 
Thank you for contacting AVG Community Support.
I see you have already reached concern team and they have helping you with the above concern.
Please feel free to reach us again if you need any other help with AVG.
Thank you.  

Hello Steven. 
Thank you for contacting AVG Community Support.
I see you have already reached concern team and they have helping you with the above concern.
Please feel free to reach us again if you need any other help with AVG.
Thank you.