I want my funds released now auth code - 606127

i hired a vehicle from Avis in Dec and returned the car on the 7th of Jan 2015. i have been waiting nedbank to release the pending authorisation and release the funds into my account but they haven't. avis has sent a cancellation request several times and nothing has been done, as a result my acc has then been in a -negative as Avis deducted their funds and the money was not released by ned bank. my salary came in on the 25th and was taken up by the -negative amount in my account and i don't have any money because of people who simply don't want to do their job. i mean how long will it take for you to release the funds a month???? my debit orders have been bouncing and I'm getting charged for that whose gonna pay for that???? my bank cant release the fund s because you fools haven't cancelled the authorisation. i want my money by the end of today!!!!!! you better release those funds now.