False adverti*****t by huawei and travelstart

I got a voucher from huawei and travelstart during lockdown, huawei just gave me the voucher code, i asked them about the voucher value but no response. Later on i contacted travelstart asking about the balance of the voucher i got, instead of helping they started going up and down referring me back to huawei. I feel the competition they ran was false adverti*****t and I dont trust the two companies anymore...