Konami has issued a public apology to players of Metal Gear Online, after the release of the Gene Expansion pack caused huge technical problems.

The levels of traffic to the site after its release caused login problems, and Konami were forced to the close the MGO Shop and refund customers after some were overcharged.

"We have been taking numerous corrective measures since the problems initially started, but unfortunately there are no permanent solutions we can announce at this present moment," said the company.

"We would like to take this opportunity to express our most sincere apologies for the problems that have affected all our customers that have been with us since the Premier Beta back in April.

"We are currently doing all in our powers to bring a permanent solution to the ongoing problems in the quickest possible time," Konami added.