Don't fly with mango, easier to drive

I have had such a horrible experience with mango airline, my morning flight was completely canceled then I had to reschedule my return flight as needed two working days with employer then I couldnt check in online because I rescheduled my flight which was mangos fault. Then I had to purchase an additional night of accommodation. I purchased a seat number 8A which was a window seat and then i was give a random seat 30D. I paid to book my seat, will I get refunded for this? Most probably give me some story and try give me some stupid voucher which i won't use as i wont fly with mango again. Really not impressed now i just found out our flight was delayed another hour. I have been at the airport for 4 hours now as they said I had to be at the airport two hours prior to flight. Seriously would have been faster to drive to joburg