D-Mart / Avenue Supermarts — products not included in the billing system

Address:

560032

Hi
This is regarding the d mart r. T. Nagar. Bangalore branch.
Few of the item are not included in the billing system. On 30 september sunday i visited the rtnagar branch and picked some items, which includes a pair of shoes costing rs.399/-. When i gone for billing the respective billing staff told me that this item (Shoe) is not in the system, so it is not possible to bill this. The remaining items invoiced and paid.
Again on 13 october saturday, i picked the same shoe and the result was same as last week (The shoe is not in the system, so not able to bill).
Today (20 october saturday) again i gone to rtnagar branch and checked the rack where these shoes are kept, but the same type of shoes are in the rack. First time (30 september) there are about 15 pairs of shoes are in the rack.
If some items are giving only to selected people or the staff are playing the game with people like me??.