Very Bad service

SARS is the most Stressing Company in SA you can't get hold of them when you want them you can even use their app to get hold of them seems like they enjoy seeing people suffer and standing endless lines just to be told you forgot this or that we can't help you...their app is not user friendly at all and I been trying to update my Contact details so I can access the app I can't...the AI will send instructions but those instructions don't work I am so frustrated at the moment it's beyond words...I requested a call back month back but still nothing not even and sms says we can't call you because of this or that