bad service

I was at vaal trying to withdraw but there machine sad insufficient balance it was on Friday 27th March but on there 26th I did a cash send reversal of R150.00 after that my balance was R348.46. I withdrew R150.00 same day there 26th and there sms I got from absa sad that my available balance it is R191.91 but on Friday when I withdrew in having insufficient funds and after I tried to withdraw with no success there minute I left a atm I got call from *** but there minute I was to pic up there phone got dropped. There previous I went to absa to find out miss Queen Nxumalo sad to me I qoute ' how can I go to atm to withdraw while I know that I don't have money ' which is poor poor service u don't say that to a customer because I'm having I msg that says I'm having R191.91 available balance were it went to??? Why I was also called by ABSA on that friday????