Car Insurance debit and policy deductions

I changed my vehicle GWM C20R to 3rd party and theft from comprehensive in Dec 2018. In January I made more changes to my policy on 4 Jan 2019 and received the document and amount was R 2040.25. Discovery decided to take off R 2179.89 from my bank account. Last REF:WRefNo# ********** 471# 3 Months later the system fault not fixed!! Last Monday the 29th April 2019 I called and added full comprehensive for the GWM C20 R. I was quoted R2624.96 in total. The total on the policy R2764.96. I called Tuesday and spoke to floor supervisor(Call took 30 minutes), he told me it will be fixed in 48 Hours. Well Last night Discovery Debit Order went off my account R 2929.00 !!!HOW DO YOU GET TO THIS AMOUNT IF MY POLICY IS R2624.96. I called this morning the same system fault still not fixed!! I opt for the driving app for Vitality and Tuesday I went to TWT Bruma for the disc for my vehicle to be told i'm not REGISTERED to receive the unit!! So since driving since Tuesday NO POINTS CAN BE ALLOCATED TO ME FOR REWARDS. Another system fault. This morning I was told by HLONY that the system fault will be fixed, points allocated for good driving and credit in my account from system fault. I am looking at new quotes today from companies that wants to do business with me in good faith!! I have been a Discovery member from 2001 and I am seriously considering leaving except my Life Policy. You would be surprised how much better quotes are out there!! NOBODY FROM DISCOVERY HAS BOTHERED TO CALL ME!! So bye bye discovery, im sure you don't need my business!!I certainly wont entertain your mediocre service. Really disappointed Discovery. 18 years of loyalty and nothing in return!!