Kurl-On — a cut in new ortho coir lcbt king size mattress

I bought a king size ortho coir lcbt matress from home town, established in big bazar, main road, ranchi, on 4/5/18by order no.[protected] and delivered on 11/5/18. But the technician come my house for fitting the bed on 13/5/18. After fitted the bed we saw a cut in mattress. After complain to technician he take photo and convey to showroom regarding this defect. I also call several times about this defect. But till date there is no response from showroom, please pay proper attention and take action from your end. Thankyou