I've been working part time at a company in a shopping mall off and on for 1 and a half year with RM4.50 per hour.This month of july i worked at the company again for 22 days ie 162 hours.Usually the company will pay me 162 x RM4.50=RM729.

But when i received the cheque,the payment is 567.75.The calculation is as below:

RM800/31 x 22 days =RM567.75

The company claimed that their laws had changed and they didnt informed me regarding this because they taught i knew it and blamed me that i didnt ask about it.And this is so unfair to me as a employee.Still,they claimed that assuming me as a full time because i worked 5 days a week so the calculation is using the basic salary RM800.In fact even full time,the calculation has to be the basic salary divided by 26,isnt it?

Due to this,can i reclaimed from the company for my previous salary RM4.50 per hour?