Yoco frustrating SMMEs with transferring money from sales

We have been trying to locate money from the Yoco sales since December last year. We had given them the bar code of the machine and asked them for proof of where the money was transferred to. They keep on asking for out bank statement and we keep on asking them where is your proof that the money has been transferred to the bank account provided to Yoco. These are SMMEs that require cashflow for their businesses