重かさねて

adverb

once more; repeatedly; again

Formal or written adverb used to indicate doing something again or repeatedly, often in requests or apologies. More formal than もう一度.

• 重かさねてお詫わび申もうし上あげます。

  I apologize once again.

• 重かさねてのご連れん絡らく、失しつ礼れいいたします。

  I apologize for contacting you repeatedly.