RE: I now realise I have done somethiong bad3 Apr 2021 20:00
Arsenalles,
I'll say better to contact them and explain things.
Is your Santander Stock and ISA too? If yes, not to add to your worries but I think you can only top up one Share and ISA account in a tax year, I assume its to stop over funding like you just did.
All the best.