Worst customer treatment & below average dentistry work!

Worst customer service treatment ever! I got my crowns for my front teeth done at the beginning of this year. First of all, my 1 front tooth is discoloured and does not look like the other ones. Secondly, when I finished my procedure they had said I must come back and do check-ups every 6 months so if anything happens to my crowns they can fix them. I was due for my check up in July and they basically expected me to pay R1000 for my check-ups when I've already paid them over R30k to do my crowns in the first place. When I asked why I am paying more money they told me I am paying for gloves and whatever - so your gloves cost R1000? Lastly, when I sent them an email to ask why they were making me pay again, they ignored me. They are money hungry dentists who take advantage of their patients and I would never recommend them to anyone