Capitec not efficient

On the 07th of November my brother in law send money into my account so on the 11th I received text from Capitec saying my account is identified as ***** as i emailed them the relevant document to their email I haven’t received any respond to them as their said the person who send money into my reported to his bank which is Nedbank as I feel like the person who send money he give his banker a wrong information and my bank is blocked and I feel like Capitec could have done a proper investigation also the person who deposited the money into my account so I send them email no respond I send the document also with the our conversation as shows that he send the money into my account as he told me the incident was closed which he was lying to his bank about the *****