I doubt that companies are ignoring your calls - it’s more likely that people are unable to answer work phones as many countries are on lockdown so the majority of employees will be working from home where possible. If employees don’t have work-provided mobile phones then they will simply not be able to answer. You may be better off contacting by email or finding a website with further details. Purely cosmetic businesses may be shut down altogether until the COVID-19 emergency is over or dramatically reduced, so I hope you are not in a rush to get this product to market.