Mental harassment for money recovery

My self Digant Joshi from ahmedabad gujarat. 1 month back i have taken 2 lacs rs from one of my dealer for some urgent financial need in my personal life and i have told my dealer that i will return it back with in 3 months. unfortunately i have to resign from my job, but before leaving form the company i have given cheque of rs. 216000/- against money i have to pay back to the concern dealer. and i have given assurance him that it may take some time but i will clear your dues. and i will try to arrange fund as soon a s possible . but the dealer is calling me daily more than 50 times in a day even at night till 2 pm he constant calling me and sending message on whats app to clear his money in few minutes and also using abusive language and threating me for the money today only while i was driving on my two wheeler he was calling me constant and i met with accident. i have requested him not to give such pressure it is not possible to clear the due in one shot. but he is not ready to listen and only giving pressue for the money. i am very much under mental pressure because of this. how to stop this man for calling and messaging can i take any action agaisnt such metal pressure and harrasement.