Snapchat often reports various suspicious activities done by some users on its platform and hence it has to suspend its accounts temporarily and sometimes permanently. If Snapchat has sent you a message that your account has been locked temporarily, in this case, Snapchat provides you some time period approximately 24 hours and after this period your account will be unlocked automatically and if this does not happen in the given period, you can go to the https://accounts.snapchat.com/accounts/login?continue=https%3A%2F%2Faccounts.snapchat.com%2Faccounts%2Funlock/ link and explain to Snapchat the problem you are facing.
In case your account was compromised(hacked), fill out the Snapchat Support Form by clicking the link https://support.snapchat.com/en-US/i-need-help?start=5145405817880576/.
And If your account is locked permanently then you are out of luck, as per its policy Snapchat won’t unlock your account.
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