Below are some official Samsung UK YouTube support videos for washing machines.
Setup and first use - Installation support
5C Check code support - Water draining issues - Can help if your door will not unlock. May also help with appliances that will not go into final spin.
General Use & Unbalanced loads - loading advice, unbalanced load issues (symptoms such as not spinning or time sticking towards the end of the cycle), detergent use and after wash advice (prevent unwanted smells)
They may not resolve all issues but it's certainly a good place to start.
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