Solution to send micro transactions through BTC ?

[sadguy]

Hello,
 We were building a project in which we have to charge 30 cents from clients on regular basis. Client funds his wallet that we control and whenever he click pay, wallet sends us 30 cents. Now with BTC obviously its not possible but the clients funds has to be stored in BTC. I was thinking if we can integrate shapeshift or similar solution and when user clicks pay it automatically convert it into an altcoin with extremely low fees, send it to us and then we convert it back into BTC. Whats the best way to do it with minimal transaction fee loss. Loss includes conversions ( 2X) and transfer.