[Resolved]  LT Online Store — I cant cancel the order or talk to them

Address: Sri Krishna Vihar, Nathua Wala, Gujronwali, Gujronwali, Dehradun

I ordered for a Wacom-CTH-490-KO-CX-Pen-and-Touch-Tablet Black/p/96591003 and paid Rupees 8024.00 online in advance on 3 may 2020 as it was very urgent for me. They mailed me the bill and generated order no. [protected]. Till 28may 2020 they have not dispatched my order. Website shows prcessing. But now they neither are picking the phone nor answering my mail. So I cant cancel the order or talk to them. What type of this online store is? Very irresponsible and having very poor service.
What I have to do now.