How to Extract Vendor Attribute in code

I have set a an attribute called "ExternalUrl" for Vendors. I would like to retrieve this attribute's value on the front-end. The process I'm currently following is:

1) injecting the Vendor Attribute service with: @inject IVendorAttributeService
2) pulling the attributes with vendorAttributeService.GetVendorAttributeById([vendorId])

This pulls content that includes 'Name' that correctly includes "ExternalUrl". However, there is no value associated with "ExternalUrl"

How can I retrieve this value?

Thank you

Sorted. The value of the attributes are stored in general attributes table which can be accessed with the IGenericAttributeService

Hi, I am stuck in similar situation where I want to read the vendor attribute name and it's values on the product cshtml page but not able to do it. I can see the same on admin cshtml page but can't get it on product page.

Can you please help me with this? Thanks.