Why hold my money if the case is closed

Capitec as blocked my account for 1 year now because a person as bought furniture and the money was suspected *****. On 14th November it as been 1 year for the account and I recently called and asked them about my account. Now they are telling me I need an affidavit and I'd. The case has been closed so I dnt know why they are not releasing mu money and also 3 of my family members. As we knw the things are sold we dnt knw wher the person is getting the money from so it should not be our problem. We have so much money stuck in our account because clients re still putting money in it and capitec is of no help. I dnt understand why thy must block our money and now the case is closed so our money should be released. It's very unprofessional of them. We have been banking with them so long but the service it horrible. Worst they only make excuses and tell us they working on it now the case is closed we want our money. Why the hell must they hold it. That is not the right thing to do. Is capitec using our money. I want my money from them and so do my family. I have emailed them on numerous occasions but they are of no use