Medlife — cheating in order / medicine price / stocks

I have been noticing for a long time that the online medicine aggregator - medlife has been behaving in the most irresponsible manner with respect to medicine supplies. They do it only for the sake of money without caring for the sensitivity of the nature of business.

This is their mode of functioning.
1. To catch the customer they take all the items under a single order, without confirming the price or the stock. The customer is first made to feel that he is getting all medicines for a discount and all medicines are also available.

2. After ordering, a message comes that certain items are not there and they shall send the remaining items.

3. They never let the customer know what is the new price at this time.

4. When the medicine is delivered, we have a new price. 100% this is more than the agreed price, never less than the previous (Confirmed price).

5. They also cleverly erase all the order/price details that we confirmed initially. So that you have no clue what was the money agreed for, which medicine, what price, nothing is known.

6. When asked for an explanation, they always say, "price and stock are decided dynamically during delivery"

My question is
A. If both are decided dynamically then why are they taking the order. What kind of confirmation we get, as a customer during the confirmation - neither price nor stock is confirmed, then what are we accepting the order for?

B. Is the price of medicines so dynamic sir, that it keeps changing every day? I ordered on may 23rd and the delivery was done on may 25th, within two days price of medicine changed by rs.30.

My concern is, just to retain the customers they lure by saying they are giving discounts and keeping medicines at a low price. But actually there is nothing like that. They already know the right price, but they undervalue it and they change it anyway during delivery.

This is cheating and deceiving the customers. Only medlife is doing this nuisance.