Update:  Dell has assigned order number and happy to see status is in production. Hope they will finish it fast and it will go through all QUALITY CHECKS before shipping. However Dell should consider my point on delayed allotment of order number in cases where all payments are cleared in advance.  
I ordered an DellVostro 15 3590 Laptop on 30 Jul 2020 through Dell India website. Dell has acknowledged through an IRN instantly but till now not assigned an order number. On 31 jul I was able to call  up coustomer care with a great effort. They informed it will take about 3 days!!! 3 days?To assign only order number? In which case the payment is complete? An IT equipment manufacturer in year 2020 is saying that? Whatever , I wish to draw attention of Dell helpdesk to expedite the process at least in this case as payment in full is done already.
Delay in assigning order number.