MyGate not paying over funds collected on my behalf

MyGate is supposed to collect debit orders from clients and then pay over the money collected as agreed to the company on whose behalf the money was collected. The money paid over into my account is less than money collected. On 12 March I requested a break down of the amount paid into my account. Since then, the call has been incorrectly put into a pending status (pending my action) twice and closed once. The company is still unable to provide me with the requested reconciliation. I have phoned twice and is merely told that the request is with IT. My business is dependent on the income from the debit orders, this company is withholding funds from me without basis or explanation.