Boat — Not taking actions regarding invoice

Company asked me to register complaint for the bluetooth head phone I need invoice pdf which is asked by boat website for that I called to customer care and they told me to go for boat wesite login ur id and download it from orders but my website is not opening in boat lifestyle then they ask me to whatsapp the boat company for getting invoice still there is no respone third time I called them they said within 48 hrs they will send the invoice in my email id, fourth time when i called they said they will send in 24 hrs, fifth time whn i called they said I should mail to Imagine marketing private limited then I mailed them still no response, sixth time when i called them it may take 4 more days to send the pdf of invoice

Only for getting my product invoice I have to come so many times and Iam very disappointed because they after registering complaint again they want 20-24 days time to complete all procedures, and I have all the boat electronics like 2 head phone and smart watch being a loyal customer they are being so irresponsible
I have all recordings of customer care which I can show as proof

Please help me to complete my things as soon as possible

Order id :888976
Email id : [protected]@gmail.com