Discovery does not care

I made a claim with Discovery for a windscreen replacement and I unfortunately got a chip soon after which led me to find out that they replaced my original Haval windscreen with the cheapest of them. This reduces the value of my car. I call discovery only to be told my debit orders bounced so they can't help me, this has never happened even once in the many years that i have been insured with discovery. I send them my statement to show that other d/o went off and there is money in my account. I ask for proof that they did not debit my account on any other date and no one has emailed back or called back. Claims was also supposed to call me back regarding the windscreen but nothing. I have been calling like a crazy person clearly to them as no one wants to speak with me even the managers. Everyone is so busy and no one understands the urgency of this matter. I spoke to Tinyiko Chibi in the servicing department who did not even bother to upload the bank statement I sent to her on to my account or even update the notes around our conversation. She did not even respond to my emails or call me back when I left numerous messages for her, I've also explained my story to Teresa Vuma in the same department who told me no one was available to talk to me but they will call me back till now. I eventually spoke to Asa, the retentions department supervisor who said she would try and make sure I am assisted as much as she is going on leave. She said she would make sure Clinton resolves and involve their finance team to find out why they got an error when they debited. I regained hope at this point as I was ready to cancel my cover with discovery but I also thought it wouldn't be fair that I walk away before they resolve my windscreen issue but guess what, Clinton did not send the email the supervisor had told me he would send me. I am so disappointed with the lack of service and care from discovery and I want to cancel, I just want them to do right by me then I walk away.