Black specs/sediments in MYPROTEIN Strawberry cream

[userDAQKTZZQYIT]

I purchased MyProtein strawbery cream recently. The taste was abnormally bitter, first I thought that is how the flavour is, maybe it has a bittwr after taste

But when My flatmates order arrived the next day( we ordered the same flavour same day) the taste was really good, no bitter taste at all

Then I noticed that there are some black sediments in the shake I use, which settle down. Even the powder smells a bit different from my friend's and If looked closely, I can see some black specs in the powder. These are clearly visible when a shake is made in water

The batch is different from my friend's, but the expiry isnt until next year

Myprotein India has pathetic customer service and they arent responding to my emails/messages

Should I continue using this product? I dont want to toss away 2.5 kg of whey

Anyone else faced this? Or know what it can be please?

The shaker is super clean btw, its in the powder.

Using the site from mobile, not sure how to post images :/. This is my first post guys so sorry If I made any mistakes