Vijay Sales — regarding delivery of a geyser that I had ordered

Address:

Pimpri-Chinchwad, 411018

I had gone to vijay sales, chinchwad branch to purchase a geyser. However, they did not have the specified product at that moment, so they told me that they'll get it ordered from the company and it will be delivered to my place in 5-6 days. They told me to pay the full amount of the geyser. So i paid...in cash.. And told them to order it.
However, even after 9 days, the geyser was not delivered to me, and also i had not received any communication from vijay sales, that my order is getting delayed or anything like that.
So i called them and asked them about the statues of my order, they said that they contacted the company and it will take 2 more days. But they guaranteed that after 2 days the geyser will surely be delivered. So i waited...
Even after 4 more days of waiting, the geyser wasn't delivered. (That is total 13 days of waiting)
So i again went personally to the store and asked them to cancel my order (Irrespective of the status of my order).
Now, in this process, one more problem was that, i had paid in cash.. But when the order was cancelled, they told me that i won't get cash in return, instead, they'll give me a cheque of the same amount, but not on that same day; they said the cheque will be delivered to my place in 2 days.
This really instigated me... When i am paying the full amount for a product in advance, then i should be getting the money instantly, once i cancelled the order... Since the fault was completely theirs...!!
By getting a cheque delivered, this means that i will have to wait for 2 more days till the cheque gets delivered, and on top of that, i will have to make a trip to the bank, to get that cheque encashed! All this extra work just because the company screwed up.
I did not agree. And i asked to speak to their branch manager (Or whoever the highest authority is). Once i said that, they agreed to give me the cash!
So why did they have to do all this natak on the first place! They could have easily given me the cash once i had cancelled the order.

I have suffered lot of grievance from this. And i would never advise anyone to ever buy anything from vijay sales (Especially the chinchwad branch)