Mobile Order gone absolutely wrong

I phoned in yesterday 06/10/17 to apply for a contract. The deal I wanted was a Huawei p10 lite with router for R299/m. The agent told me it was declined,however, she had something else I could qualify for. She asked me what type of phone I want and I still wanted the P10 life, which I got for R269/m, as she explained. She then went through the whole process from credit checks,to my banking details, my adress..all of that. This deal was approved! Then she explained to me that I had to wait 7-14 working days to get the order delivered. She also told me they were going to deduct the first installment within 48hrs (which also came as a shock to me since I haven't received the phone yet). She told me they would deduct this amount to "test" if my banking details were working. Anyways, this morning 07/10/2017 I got an SMS saying my order has been declined due to credit vetting. This is frustrating as I was already told that I got an approval for this deal. I contacted telkom even of their Facebook page but no response. This is absolutely ridiculous!