Hero Motocorp — delay in providing parts of karizma r

Address:

North and Middle Andaman, Andaman and Nicobar Islands, 744205

An order for the parts of engine repairing of karizma r model is placed on akt automobile at port blair because of registering complaint email. They assure me the item has been despatched and soon in 7-10 days delivery will be made, as i asked to use courier service with extra charges. 20 days passed, spares are not received. Is this there courier service or regular service taking so long or their negligence. When will i be going to get my spares, as my bike's engine is opened and place in open place more than 1 month due to delay in spare parts arrival? Even though i agreed to bear the 8% cost for courier service are they using regular parcel service and will charge me for courier service. How do i know that?