I want to send eth from metamask to idex or kucoin but I can't.

Transaction always gets lost.

Does anybody know how could I solve the issue?

I was thinking in using the testnets of Rinkeby or Kovan, Is that easy?

edit:

I tried metamask and failed, tried my ether wallet and failed.

Now I see inside of mew that I can choose several options like infura, I tried them but got a failure again.