I am one of the permanent costumers of your shop
I have not got any answer from them till yet.
I will write "I didn't get any answers from them till now" instead.
Please, arrange everything as soon as possible and either replace this mixer with a new one or return the money so that I can buy another one.
I am not sure if the grammar here is right or not.
It is my son's birthday five days later
Here I will write "My son's birthday is in give days."
I am a new one in Writing.
If I mislead you, I am really sorry.
Hope the reply will help you.
Wish you good luck. =)