Re-submission of E-return Acknowledgement

The Acknowledgement of E-filing must be forwarded to the CPC Banglore within 120 days from the filing of return, failing to do so makes the return filed in valid.

So you need to file the return again

u again send by speed  post the same E-Retun ack. in orginal as signed by the assessee to the CPC, bangalore. the causes  of non-receipts also they included in their mail that poor printing quality, so in ur case it may be of a poor printing quality. so, u submit one xerox copy of  ordinary  post copies already send by u  & one covering letter (letter containg that i am already send the same to u)  along with  original e-retun submission. eventhough covering leeters & any other copies were not  accepted  by the CPC. it gives some relief to u, after CPC  may also considers the same.

u do it, it will works.