Worst Service from a trusted bank

I transfered R500 from my account to my virtual card. I only used R250 and obviously R250 was left in the card. I then tried transfering the remaining money to my other account of which it just disappeared..i check in my transaction history and there was no sign of it.this happened on the 25th of April and have been in contact with standard bank holding for more than 15mins almost every other day as their lines are busy at times not getting through as my airtime runs out. But when i finallt get through i dont get feedback as to what happened to my money. Today i am so disappointed as i called in with my last airtime waiting for more than 18 minutes and on my sevond attempt i called at 19:53 and was made to wait on the line as the agent who was going to confirm with his (team leader i assume) just hung up on me after waiting for so long, please tell me what am i meant to do now, as i have used my airtime which is more money than i am disputing and i never get assistance. I am really disappointed in a bank i thought cared about its clients