Is it possible to cancel the pre-order of spare parts?

Question

Mobile devices

Good day everyone!
Sorry that I'm asking here, and not on a forum for mobile technology (I just don't know which thread to write there to get an answer). I ordered a battery for the device (smartphone). The master promised to provide within 8 days from the date of order ... Three weeks have passed, the result: there is still no battery (for the 6th time he says that the package is on the way), he does not want to return the money.
It's just that the device no longer holds, it only works from the outlet. During this time, it would be possible to resolve the issue, and more than once.
Question to those in the know: how to refuse to order a battery? Can you rely on some kind of law?
Ps bombing due to the fact that tomorrow we go on a long trip, and the bodies are dead ... And I, damn it, hoped that they would do everything on time.

Answer 1

aliexpress? just do not accept the parcel at the post office, refuse. She will be sent back as soon as it is seen on the track, open a dispute on Ali, the money will be returned.
Trackless parcels have been going to me for 4-4.5 months lately, a record. Sellers that do not save and send with tracking - up to a month stably comes. What kind of store is this in 8 days?
How much did the battery cost? A new modern smart costs $50. You could also get a power bank.