Two months have passed since VB agreed to send me a new seat clamp, and I'm still waiting. They said there was a problem with the shipment... I think the best option now is to try to get an SL7 seat clamp, as it appears VB used the same design.
After 2000 km, the only issue I found is the headset becoming loose, I had to adjust the preload a couple of times. Otherwise, it's a fine frame.