Every company is subject to pressure from their country's intelligence agencies. If an American company is ordered to spy on its customers, there's little it can do. This happened with Lavabit, which Edward Snowden used as an encrypted email provider. The US government forced the founder of Lavabit to hand over the website's SSL private key.
If you're afraid of a foreign country using its technology providers to spy on you, you have two options:
1. Don't use technology from that country.
2. Only use technology from that country that you are confident you can audit.
There's nothing Huawei can do, beyond what it's already done (offer to open up its tech for audits by foreign intelligence services), to allay the fundamental fears you're expressing. In the same manner, there's almost nothing American companies can do to allay the fears of foreigner countries (or US citizens, for that manner) that their tech won't be used by American intelligence agencies. The logical conclusion of this is that every country must develop its own technological base, and that's not a future I want to live in.