you can also send a notice to company saying that you have not received your cheque from 2015 and you need a fresh cheque you can attach all your account statment of year 2015 to company.
Then company can track that cheque that where money is deducted.
This way you will have more benefit at was mistake on part of company mailing to wrong address not you and filing complaint and suit.Also you can claim that you have no.information of said amount your are more likely to obtain the amount from company.