Pathetic customer service

I app**** for a new RA account with Sygnia on 25 February 2020. After hearing nothing for several days except for an auto response and a Case number I contacted them again on 27 February 2020 as I needed this application to be registered before the end of the tax year. The person that I spoke to said that my application was missing my tax number and the amount on page 3 did not match my deposit. They also said they were about to email to request the same. They asked that I resend page 3 of my application together with the tax number as a reply to the email they are sending. When I received the email I immediately responded with the requested details. I have heard nothing from them since. I emailed them again today. I got a miss call from a Cape Town number toda which amongs a whole lot of other miss calls I get during the day. When i called back the number it was the same person from last week Friday who said they did not get the information requested. So when I asked them why they did not attempt to contact me to inform me of the problem the answer was they were busy typing an email to me when I called. If I had not attempted to contact you the last two times I would have had no idea there was a problem with my application or that you had not received my documents. Why do you give people miss calls for important correspondence? How are they supposed to know who was calling or what the issue is? I am really scared that I have made a terrible decision investing with this company if the quality of customer service is anything to go by.