If you didn't find the answer until now, i would suggest to open a case to the corresponding TAC of your country by using the following link
http://e.huawei.com/en/service-hotline and here you will find the contact information so you could open a new Service request by providing the SN of the VCN and you will be contacted by our colleagues to help you solve your inquiry. :)
Please do not hesitate to contact us!