Mercury vouchers are for just 30 days!!!

Mercurybet has a voucher programme.I had bought a Mercurybet voucher from an international agent and I totally forgot it during last Easter time and when I finally realised it, too late it was .Vouchers must be deposited in 30 days maximum.I contacted with Mercurybet customer service and they removed the problem and deposited it.I will never ever do it again.I d almost lose my 50 bucks.Freaked out :(