"The last two remaining SovRoms, Sovrompetrol and Sovromcuarţ, were disbanded in 1956"

If we're talking about 1950s especially, I can see how this link is relevant. Unfortunately I can't validate any clauses that are there.

However, in a general context of Soviet-Romanian relationship, USSR imported a huge amount of Romanian furniture, footwear, clothes and other consumer goods. I assume these were paid for nicely. As far as I know Romania had uniquely severe economic problems during communist period even when compared with neighbouring countries, but I don't think you should blame USSR solely for that.