Nokia India — wrong information

Dear team,
I purchased nokia 1 on 15th july 2018 but after 5 days only it started hanging badly. As the executive told its expandable memory upto 128 gb we purchased 64 gb memory card which was only available. Now after asking 2 times to them to move files to sd card and make sd card as internal memory... First time the executive said done but it was not actually... Again we went to get the settings... That time whole reliance digital at habsiguda hyderabad was unable to do the settings and saying it will be like that... U only downloaded extra apps... Even though i downloaded only daily required apps that should also come in sd card otherwise what is the use of purchasing sd card. That nokia executive (Ganesh) was such a fool. Now i want solution as soon as possible or refund.
Thanks