It's 'advice' which is a noun, not 'advise' which is a verb. That's okay. It's not quite right but it's acceptable and the world isn't going to stop because you made a mistake. It's correctable. Following your logic though, you need to retake English as a subject because nothing else will suffice. It cannot be put right and you must start again. Fair enough. With regard to the plastering, it is clearly a poor job but as has been pointed out, it can be tidied up which might be the most expedient solution. No-one has suggested it's good, but you seem to have taken offence that there isn't a national outcry and a #hackitoff campaign in full swing. Relax. Have a caramel bar.