Clear glass lens protector fallen out

Lens protector has come out and I have had to sellotape this into place so the camera doesn’t get wet. Contacted eufy and as it’s just outside the warranty they will not repair or replace, will just give me a small discount to replace it which I think is totally unacceptable as I haven’t got a spare £100.00 laying around at the moment. When asked if this should happen they said no it’s defect but still will not replace. Not happy when my whole home security system is with them and doesn’t seem as robust as they have made out!