Doubts on EPF.

I worked in an office that had EPF for 2 years. Around 2 years ago I changed to a start up where less than 20 people work so EPF isn't mandatory. Majority of employees opted not to go for voluntary PF. Now for 2 years there hasn't been any deposit to my EPF account. Will this cause an issue in the long run? What are my next steps to make sure nothing happens to the PF amount already present.