Rcm refund for small service provider

How can small service provider claim refund of service tax deducted by company under reverse calculations while making payment for services?  Mutual fund co. is reducing Service Tax ( calculated on reverse workimg basis) while making payment to its agents saying that the tax as per reverse charge mechanisum is calculated and reduced from their value of services.  Here, an agent who is small service provider( i.e. below 10 lakhs turnover ) is loosing his money. Are there any provisions to recover that service tax portion?