public function getCashbackDetails($merchatCashbackId, $paymentType = 'CASHBACK')
    {
        $main = $this->MainInst;
        $url = $main->GetConfig('API_URL') . $main->GetEndpoint('CASHBACK') . "/$merchatCashbackId";
        $endpoint = '/v2' . $main->GetEndpoint('CASHBACK') . "/$merchatCashbackId";