Capitec bank refuses to payback my money

Immediate payment for R350 done however it never reflected on the other account,I went to Capitec they said they will recall it ever since the 15 still nothing ,last week I got a call after I complained here they asked me questions and promised to get back to me till now , nothing my R350 not being paid back, I am just not sure as to what is the purpose of immediate payment , paying an extra fee but delivery nothing