There is no appeal against an arbitral award on the merits. The only route is a challenge under Section 34 of the Arbitration and Conciliation Act, 1996, on the limited grounds set out there — and even that is not a rehearing of the case.
An order deciding a Section 34 application can itself be appealed under Section 37 to the next higher court, but this second-level review is confined to whether the Section 34 court applied the right legal test — it does not reopen the tribunal's findings of fact or reasoning on the merits a second time.
Parties who go into arbitration expecting a fallback right of appeal if they lose are working from a false assumption — that finality is the entire point of choosing arbitration in the first place, and it should factor into the decision to arbitrate rather than come as a surprise afterward.