The more authentic Indian Restaurant & Takeaway is on 3 Wendron street, Helston, Tel. 01326 560560 and they will deliver to Gweek Campsite (usually - unless extremely busy). Also they normally can accept payment over the phone .
The other Indian which will deliver to Gweek Campsite only accepts cash on delivery - this is the Anglo Asia at 2, the Parade, Helston, Tel.01326 562881