The bankruptcy public record is deleted from the credit report either seven years or 10 years from the filing date of the bankruptcy, depending on what bankruptcy chapter you filed under.

Chapter 13 bankruptcy is deleted seven years from the filing date because it requires at least a partial repayment of the debts you owe.

You should know that for lending purposes, you may still be eligible for a mortgage loan within as little as 18 months from your date of discharge.
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Even if you feel that you did not enter into an agreement, a court may find that you are bound by a contract pursuant to the legal doctrine of ‘promissory estoppel.” 

The court will determine if  (1) a legal relationship either exists or is anticipated between the parties, (2) representations are given in circumstances that lead the other party to assume the promise will be performed, (3) reliance by the other party on the promise or representation to their own detriment, and (4)  it would be unconscionable for the promisor to go back on their promise.

When creditors do contact you, they are required to inform you about the debt that they are collecting on. This means that they have to tell you who they are, how much you owe, and provide you with information on how to contact them so that you can either verify or dispute the debt.

You have the right to tell them to stop calling you, but that alone will not stop other collection efforts.