Reliance Digital — WronG item delivered

I purchased a Lenevo thinkpad from Reliance digital online site. when the package was delivered at home, They delivered a Boat power bank, On telling the delivery boy that this is not what we have asked for, He mentioned this is what was handled to him.

Moreover, the invoice said Lenevo thinkpad, but item.delivered was a power bank. I have tried contacting the reliance digital by every mode i can..mail, call, mesages. I have not recieved any response from them. Its already more than **hours. They only send a automated reply.