Bad agent service

I have no problem towards Snomaster Their service is great and Ive bought some spares from them to repair some Snomaster camp fridges and Ice machines Ive been in the HVACR industry for more than 30 years and belief in prompt service and quality workmanship myself But April this year they decided not to sell spares to the public anymore and now you have to buy thru an agent The agent does not respond on WhatsApp and after two calls no proforma invoice as yet My client is waiting for his fridge and I need the spare part Im in the dark and it seems the agent has all the time in the world How do I become a agent Snomaster?