Student or Learner
3000 pcs of T89 have some problem and will not ship by this week. We shall arrange the other two items by LCL shipment instead of one 20' container as they are only 8.9 cbm. Please confirm your acceptance
In the first place, you have three sentences (not "this sentence" as your subject misled me to expect). I will only look at one sentence at a time.
3000 pcs of T89 have some problem and will not ship by this week.
If you start a sentence with a number, you must spell it out:
Three thousand ...
Or recast the sentence to avoid starting with a number:
There are 3000 ...
I see no good reason to use abbreviations in sentences, as they can be easily misunderstood. Use
The use of some is odd. Either they have
... some problems ...
or they have
... a problem...
By this week is pretty obvious, as it is already this week. Therefore, use
...will not ship this week.
...will not ship by Saturday.
(or whatever the promised date was)
Now, I'll let someone else tackle the next sentence.