Hi all, did anyone complain anything to MCMC before?

I am a seller in Shopee and recently Shopee forcing seller to use Shopee Xpress. Knowing that Shopee Xpress is terrible, we wish to disable it and use other courier but Shopee dont allow.
Wanna ask if i complain to MCMC how would they handle it, does anyone know here?
We have concern also if MCMC show them whose the seller complain ended up Shopee revenge and do dirty tricks to our store.

Detail of the story:
Last year we have one order under Shopee Xpress, a few item missing inside the package.
We successfully disable Shopee Xpress. Then recently Shopee curi curi enable it without asking, we complain why is it enable without informing but they keep dragging the issue.
Then now ask us submit request to remove, but reject us afterward saying missing/damage is not frequently happen (August itself lost 4 parcels and 2 damaged!!! )
Email them asking how can they just enable the Shopee Xpress without asking since it is disabled last year but they refuse to answer.
Even walk in customer telling us that Shopee Xpress is terrible.

so if you use windows and windows block other browser other than edge what will you say

don't let big corporation bully you