Bad service delivery

I'm so disappointed by Buffalo logistics since from last week my 2 packages are out on delivery but when I track them it says cosignee is not available whilst I'm always at home my address is correct & my number are correct but I haven't got their calls I've tried to text them on whatsapp & their are ignoring my text I've called one of the guy last week & he said he is not delivering shein packages I've asked for numbers of the person who was is delivering shein and he said he is not allowed to share contacts...I need my packages & I'm worried about my package which is still on its way