New contract declined - no reasons or feedback

I app**** for a new contract with Vodacom at Garden Route Mall on May 11, with a consultant by the name of Heinrich. I have three already, R1000, R210 and R110 pm, a mixture of capped and not. To my surprise, Heinrich told me it would have to go for vetting. I had just received a debit for over R4 000 from Vodacom, which went through my account, which was completely incorrect, being over double, and Vodacom took their own sweet time to reverse it. The next day I received an email, it appeared to come from the shop itself, saying the application was declined, I emailed back asking for reasons. To date I have had no response. My account has always been paid in time by debit order, the R1 000 contract was approved with no hassle recently. I am very disappointed with Vodacom, and seriously considering another company, having been with them for over twenty years. For the debit order fiasco, which I'm sure must have inconvenienced a lot of other customers who did not have that amount of funds in their account, i should decline Vodacom, not the other way around!