Transferred to different people till call cut used all my airtime

I called the number on the application for credit card limit increased, they transferred me to different call centre saying its a premium card, i get to the premium card then they tell me no its sorted till the lady put me on hold for 15 mins only to tell me i need to go back to the quotation department. I then get to the quotation department when im told to hold again and transferred again thats when my call cut. I did the application on the FNB app then i told me its approved but only to get a email saying we will send credit card i dont need a credit card i have 1 already i just need limit increased. For 30 mins i stayed on the call then it ended due to all my air time running out.

Its pathetic i pay so much bank charges as a premium client but get service like this