The phrase "do not instead" is grammatically correct and can be used in written English.
It is typically used to indicate that a particular action should not be taken, but another action should be taken instead. For example: "Do not instead opt for the cheaper option, as it may not be as reliable." In this sentence, the phrase "do not instead" is used to advise against choosing the cheaper option, and instead suggests choosing a more reliable option.
Faucet, No. Q. Restaurants will always provide tap water to customers, but some self-service cafeterias do not; instead, they sell bottled water.
Brain cells can improve intellect only if they join the existing neural network, and many do not, instead rattling aimlessly around in the brain for a while before dying.
In addition to the alterative-hygiene suggestions, other signs convey ways to save water and the dangers for those who do not: "Instead of washing clothes, don't wear any".
If they do not instead produce a detailed policy – one setting out who precisely they want to protect – they will be in a weak position to negotiate with betting shops and other gambling organisations until 2019, when their policies are scheduled to be reviewed again.
Patients only report reactions which they consider important; they do not instead report the ones which they consider non-serious, unless they are specifically questioned (which has not been done in this study).
If politicians from all parties... do not instead tone down this sweeping legislation a great chill will descend on the free republic of online writing, which until now has been a liberating and democratic force in modern British life.
Your partner can say: "You say you understand, but you don't!" Instead, say "I hear what was said".
But it did not, instead choosing to assume this risk.
Obama did not; instead, after chatting with a Blagojevich aide in the back, he slipped out.
Akamai does not, instead piggybacking on network carrying capacity from UUNet, Sprint and others.
Saad did not; instead, in 1985, he apprenticed at a bank, where he learned how financial markets functioned.
