Unfairly blocking my account

Capitec blocked my account without informing or investigating thoroughly. After I found out my account is blocked I went to the bank to ask dem they said they suspect *****. How can I ***** people because Whatsapp stockfela.. people join it willingly.. I feel like capitec did not investigate properly there are many people playing this thing.. employed and employed people but why did they choose to close my account and leave others account because we were all playing..I was treated unfairly