Horrible customer service.

I have gone to SARS 5 times to try and sort out my e-filing and every time they tell me it will work but whenever I try it never works.Then they tell me I owe them R12000.00. So I payed them the amount now they have MBD calling me saying that I owe an extra amount. I can't keep taking off work to resolve this issue and will not continue to pay these penalties until they assist me with my e-filing.I have never spoken to such a disrespectful bunch of employees in my life. Not impressed.