Web3 sözleşme yöntemi bir işlev değildir

web3 sözleşme yöntemi bir işlev değildir

For anyone else struggling, try to check whether your ABI json actually 
includes the method you are trying to call. It could have been that 
you copied the ABI for the wrong contract as Remix would by default 
list the first contract in the default template rather than your newly 
created contract.