Standard bank ***** accomplish

I contacted standard bank 2 months ago to reverse an online payment, due to the fact that the person that sold me a phone committed *****. He sold me me a **** iPhone, and when i realized it was ****, i immediately contacted standard, as i paid from my standard bank acc to seller's standard bank. The bank immediately froze the sellers acc3, and instructed me to submit evidence and police case number within 48 hours. I submitted everything within the specified time. I contacted the bank more than 10 times over the past 2 months, without any success.. The call centre agent can only escalate my reference, and someone will contact me within 48 hours.. Not once did i receive a call from the bank. I requested to speak to the investigator, because i have more prove of the ***** committed.. Standard bank never contacted me, and after 2 months i must hear that they decided not to reverse the transaction. Standard bank committed ***** themselves by not doing their job. I will not leave this here. I hold standard bank responsible by not contacting me, after several request to submit more evidence #pay back the money