Cummins SA - quick to take your money but hard to refund......Bad for business

Purchased Truck parts the value of R109824.91 Excl on the 19.01.2018. I returned the oil pump core on the 13.02.2018 for a refund. to date after numerous call and emails I am still waiting for the refund. Below are the email addresses for all in copy for this query : ********** ********** ********** ********** ********** **********