Chemlab Supplies do not deliver on their services

I purchased measuring cylinders online 26 June 2023, followed it up since then. They do not pick up their phone or respond to any of my emails, web and WhatsApp enquiries. They reflect as legit, charge VAT as if they are registered with SARS as a VAT Vendor. DO NOT PURCHASE FROM THEM - YOU WILL NOT GET ANY RESPONSE FROM THEM