“Had it not been for your advice, I wouldn’t have made it” is correct and I’ve heard it plenty of times. 🎉 “Were it not for your advice…” does not sound natural. “I wouldn’t’ve made it if it wasn’t for your advice” is what I would hear in Chicago, Illinois (and probably what I would use 🙈).

The intended meaning of each sentence is clear and the two mean the same. However, both are lousy sentences because the verb "to be" is wrong for what you want it to accomplish. When you think about their literal meaning they just do not make sense (if your advice were??? sounds weird). I would classify both as colloquial English. It would be better to replace both sentences with "Without your advice I wouldn't have made it". Or, if you are intent upon using subjunctive mood you could say "Had I not had your advice I wouldn't have made it" or you could make the other person the subject: "Had you not offered your advice I wouldn't have made it"

They're both correct and they mean the same thing.

Both sentences are grammatically correct, but they have slightly different structures and convey a similar meaning. "Were it not for your advice, I wouldn't have made it." "Had it not been for your advice, I wouldn't have made it." The first sentence uses the subjunctive mood with the verb "were." This structure is more formal and is often found in more literary or poetic contexts. It emphasizes the hypothetical or contrary-to-fact nature of the situation. The second sentence uses a past perfect construction with the verb phrase "had it not been." This structure is slightly more common in everyday usage and tends to be seen in both formal and informal contexts. Both sentences convey the same meaning: that the person's advice was crucial for the speaker's success. The choice between the two constructions depends on the desired tone and style of the sentence.

Both are fine. There are also other ways to say it, as the others point out.